Hey guys! Do you know a manga with a dude going on with someone because it’s a pledge or...

Do you mean this one? http://www.mangago.zone/read-manga/i_seriously_can_t_believe_you/

Here are a couple that start off as punishment games.

http://www.mangago.zone/read-manga/sono_suki_honto/

http://www.mangago.zone/read-manga/batsu_game_conro/

http://www.mangago.zone/read-manga/batsu_game_conro/

Thx a lot