Sis-Con with Dimensional Chat Group

Time was moving fast, and it was time for Tatsuya's birthday. The birthday party was being held in the cafe where they often gathered together, which was located near the school.

One by one, people came one after another from Tatsuya and Miyuki, then Mizuki, the three of them waited for the rest of the people while drinking coffee at the cafe, but Miyuki was very restless at that moment.

"Miyuki, what's wrong?" Tatsuya asked with some doubt when he looked at Miyuki's state.

"Ah, nothing, Onii-sama." Miyuki quickly shook her head since there was no way she could say that her aunt might come today.

Tatsuya wasn't sure, but he just patted Miyuki's head to make sure that she could feel better.

"Onii-sama...." Miyuki felt quite embarrassed when she was patted so suddenly, but at the same time, it also made her calm down slightly when in truth, she was still worried about Haru that might bring her aunt to the party.

As for Mizuki, she could only stare at both Tatsuya and Miyuki in a blush since what they were doing was like a lover and not like a brother and a sister.

While they were waiting, Erika also came. "I'm here!" She entered the cafe with a "bang!" then she looked around and asked, "Mizuki, Miyuki, Tatsuya, where is Haru?"

"Oh, he hasn't come yet," Mizuki said.

Tatsuya nodded and asked, "Erika, do you like him that much?"

"Wh--?!" Erika was startled, but then her face became as red as her hair, and she quickly denied it. "What are you talking about?!"

"......" Mizuki, Miyuki, and Tatsuya.

"Well, Erika, I won't surprise you, but Haru might bring his girlfriend today," Miyuki said.

"Huh?!" Erika was dumbfounded and asked, "Are you serious?" If it were before, she would say that Haru had an ordinary face, how could he have a girlfriend, but when she saw his real face, she knew that it would be easy for him to have a girlfriend.

"Un." Miyuki nodded.

"......." Erika wasn't sure, but she felt a bit down, even though she had expected this problem. She then sat down on the empty seat then slumped there with her face pressing against the table.

"......." Miyuki, Tatsuya, and Mizuki.

The three of them had expected this problem before, but what could they do? After all, the subject of Erika that she had put her heart into had already been an owner.

Before long, Leo, Honoka, and Shizuku also came, but unlike the rest, Honoka and Shizuku brought their present to Tatsuya, who had a birthday today, after all, Miyuki had told them about Tatsuya's birthday before and even though their relationship wasn't that particularly close, it was a necessary thing.

"Huh? Tatsuya is on his birthday?" Leo, Mizuki, and Erika were dumbfounded.

"Yeah, I'm surprised, thank you." Tatsuya had a light smile on his face right now, then looked at Miyuki, who had planned everything, and somehow he understood why she showed such an expression before. He patted his little sister's head again, but then another guest entered the cafe.

"Oh, sorry for being late," Haru said as he entered the cafe. In his hand, there was a cake that he had baked, and his other hand was holding someone's hand.

"........."

Everyone stared at Haru, then looked at the woman beside him.

"Hello," Sumire said with a smile.

"........."

It was their first time meeting Sumire, so they weren't sure who she was, and they had to admit that her appearance was quite eccentric, especially that lab coat, which was stained with a red mark there.

As for Miyuki, Honoka, and Shizuku, they were dumbfounded since this woman was different from the one that they had seen in a photo. After all, in the photo, the woman had black hair, but Sumire had messy purple hair.

"She's my girlfriend. I have told Miyuki that I'll bring her today, right?" Haru said while looking at Miyuki.

"Um." Miyuki somehow felt quite complex. She felt relieved that her aunt didn't come, but at the same time, she also knew this woman since she had seen her when they were in Yokohama before. 'Still, did he cheat on aunt?' After all, the thought of her aunt accepting her boyfriend to date someone else while dating her aunt had never crossed her mind. The existence of a harem had never been thought existed in her mind, so she was confused at this moment.

On the other hand, Mizuki, Erika, Honoka, and Shizuku observed Haru's girlfriend, and they had to admit that even though Sumire seemed to be quite eccentric, she was gorgeous, but at the same time, she was quite older than them?

'Is it what they call a mature charm?'

They weren't sure how to describe their feelings, but they didn't want to lose somehow.

Sumire looked at the four girls amusedly then hugged Haru's arm directly, which caused the girls to keep staring at her with an intense gaze. She smiled and said, "Your harem at school is fun to tease."

"......" Haru.

"Well, don't tease them that much." Haru then looked at Tatsuya and said, "Happy birthday, Tatsuya. I brought you a cake today."

"Thank you, Haru." Tatsuya smiled, and his mood was very good when he learned that Haru had a girlfriend, so that meant Haru wouldn't become his brother-in-law in the future. Knowing that fact might be his best gift for his birthday in his entire life.

"Come on! Let the party start!" Haru said without hesitation.

"Oh!" Leo also raised his voice with a smile. As for his reaction, it was pretty much normal, or rather he didn't think too much.

With all of that, Tatsuya's birthday party started, and they looked at the cake that was brought by Haru and couldn't help but be amazed since the cafe in front of them seemed to be so delicious.

"Haru, where did you buy this cake?" Shizuku asked.

"I baked them myself," Haru said.

"......."

"Well, let's just light up the candle," Haru said and put some candles on the cake before he lit them up. He then looked at Miyuki and gave her a signal.

Miyuki nodded before she looked at Honoka and Shizuku, who also gave her a nod.

The three of them were surprised by Haru's ability, but they had to admit that this guy was too amazing, right? Not only music and magic, but he was also good at cooking, which made them quite dumbfounded somehow and also felt quite jealous of Sumire at this moment.

"Wait, Onii-sama, don't blow the candle. Let us sing a song for you," Miyuki said.

"Huh?" Tatsuya was dumbfounded.

Miyuki didn't give Tatsuya a chance to react and gave Haru, Honoka, and Shizuku a signal to start the song. "Ready, and..."

<BGM: Mayo Chiki - Happy Happy Birthday>

"Happy Birthday to you

Happy birthday to you

From me to you

Happy Happy Birthday."

Leo, Erika, and Mizuki were dumbfounded since they had never heard this song, or more importantly, they didn't know that Miyuki, Haru, Shizuku, and Honoka were going to sing a song!

Tatsuya looked at Haru, Miyuki, Honoka, and Shizuku, who sang a song for him, and somehow he couldn't help but feel moved at this moment.

"Today is a day when I can see your special smile

That moment will be when all wishes are granted."

The combination voices of Haru, Miyuki, Honoka, and Shizuku made the whole cafe's atmosphere so cheerful, and everyone in this cafe, including the owner, was also attracted by the song and couldn't help but enjoy this song together.

"For us to have met each other

It's the best gift there can ever be

Come on, blow out the candles."

Miyuki sang those words with all of her feelings since she really felt that her best gift was to meet her brother.

On the other hand, even though Tatsuya's emotion had been erased by his mother, he could feel that his heart was trembling and wasn't sure why, but he felt that his heart was so moved at this moment.

"Happy Birthday to you

Happy birthday to you

From me to you

Happy Happy Birthday."

With the cheerful song, everyone also started to join since the song wasn't that difficult and it was very fun to sing.

"From me to you, happy happy birthday."

At the end of the song, everyone clapped their hands together and said, "Congratulations!" together.

"Thank you, everyone," Tatsuya said with a smile and thought that it might be his best birthday in his entire life.