
Natsukage, ni sayonara briefly mentioned their marriage and how everyone was there, but that’s as much as I know.
Most characters, if they even do even get married are shown to have done so do on their own (no family or friends present)
https://www.mangago.zone/read-manga/natsukage_ni_sayonara/

yeah i know there's some that do that but a lot of them are set in reality yk? its really unfortunate and the more people that are aware of it and are called to action over it the better.
anyway:
https://www.mangago.zone/read-manga/dirty_high/ (ceremony not shown i think? but shows proposal and timeskip)
https://www.mangago.zone/read-manga/ao_no_flag/ this one honestly barely counts but i want it include it cause i love it
we need more marriages. im tired of bls just being a happy ending and thats it. wheres the ceremony? where is the declaration of love in front of the people you love?? MORE WEDDINGS I SAY!!!