During the development of the
Nintendo Switch, seeking new avenues and genres to attract people to the platform,
Nintendo approached Ruby Party to develop an
otome game for the platform. Ruby Party, who at the time had no experience with home console development, pitched a romance game, which Nintendo greenlit around 2016. However, during the development of the title, the project's scale grew from a romance title, to one focusing on multiple, different kinds of bonds. According to Mei Erikawa of Ruby Party, doing BMB was a challenge since most of the staff did not have experience in creating a game that can cater to male gamers. She also mentioned that most of the staff previously worked on
Touken Ranbu Warriors. Character designs were illustrated by
Yusuke Murata. == Reception ==