Gonna answer in English cuz I can't express my thoughts properly in JP yet. Also, long explanation ahead, so I'm sorry in advance haha.

Well, firstly the party was full of ojiisans and literally everyone except their little kids are way older than me, so I couldn't really fit in. I couldn't relate to their jokes, I didn't know almost all of the songs they sang in the karaoke, and a lot of them were people I haven't seen since I was like 5 or 6 and I'm 21 now. Well, if you're asking why I still went to the party, it's because my uncle, who happened to be the birthday celebrant, and his immediate family, are very close to me and my family. So out of respect, I went there and brought pizza. I didn't expect that there would be so many unfamiliar attendees lol. So anyway, I liked the pool, I liked the food, so the party wasn't all bad. And since I couldn't blend in with the guests, there's really nothing left for me to do. It just so happened that a new patch from Genshin Impact came out in the same day, so I decided to play it to at least entertain myself. That's all. ^__^