Responses
They’re all throughout here and there but mostly background characters. They appear most prominently in chapters 2 and 3. They have a little bonus comic at the end of chapter 3. They have a longer bonus comic at the end of chapter 6 (the fan translation chapter 6).
After that I’m not as sure because volume 2 annoys me with the introduction of a third wheel, and it’s a lower quality translation that’s up right now, so I haven’t obsessively read it as many times as I’ve read volume 1 lol

Why is he letting he's friend kissing him like it's normal ....Were they together even before the start of the story in the manga?