Hi do anyone know which BL that have wedding sorry I forget everything about the manga I ...

Yome ni Konai ka ?

http://www.mangago.me/read-manga/yome_ni_konai_ka/
http://www.mangago.me/read-manga/hanamuko_san/
http://www.mangago.me/read-manga/kanga_na_spoon/
http://www.mangago.me/read-manga/wild_rock/
http://www.mangago.me/read-manga/mauri_to_ryuu/

This one is one of my all time favorite marriage oneshot
http://www.mangago.me/read-manga/hanayome_wa_oku_san/

srry, fave short story not oneshot

Yuki shimizu, author of ZE, made one story like you described. Maybe you can check it

Lol Yup! thats the one i recommended, got you covered