It wasn't anything different than how they usually were.
Dazai was sitting on the roof of the abandoned building a little while away from Chuuya's house, Chuuya was sitting on the edge of the roof. Dazai was wearing a band-t from some emo band he liked, a pair of high-waisted, black ripped jeans he'd cuffed at the ankles, white socks, and converse while Chuuya was wearing a pair of baggy basketball shorts, knee-high compression socks, some black tennis shoes, one of his newer, clean, black binders, and a ratty, old tank top that was covered by a dark green hoodie he ~~did~~ didn't steal from Dazai.
They were smoking, Dazai had supplied the cigarettes ~~rich fucker~~, and just yapping. They'd talk shit about the people at their school during theses times, stare at the sky and cloud watch, look out at forest around the abandoned building and yap about random bullshit, bitch about their parents (Dazai had way more to bitch about than Chuuya did, but still), sometimes Dazai was walk along the edge of the building and joke about jumping off, they'd tease each other, or just sit in comfortable silence and let the time pass by. They liked the spot because they could fuck around and be as loud as they wanted and Chuuya's older sister or brother wouldn't look for them (mostly Chuuya, they did not like Dazai).
Dazai was messing around, practicing blowing smoke rings and what not, when he piped up and asked Chuuya if he wanted a "shotgun kiss".
Chuuya blushed. Now, they were both hormonal teenagers who knew the other better than themself and kissing was something they'd done before. Neither of them were shameful about this, they didn't care. Maybe Chuuya was a little embarrassed, but he wasn't shameful. I suppose he also wasn't used to his best friend of seven years asking to kiss him, though they'd been close like that since they were fifteen.
He got up from sitting on the half-wall around the roof and plopped down in front of the younger. Dazai smiled and took a drag from his cigarette.
Chuuya nodded, "Sure."