Music beans make farts plentiful. And lucky for you, music beans themselves are also plentiful, so you can eat plenty of them to power your musical bean toots.
Your music bean farts are too plentiful to leave your home (ほう). If you tried to leave your home you'd definitely fart all over people outside, so you keep your plentiful farts to yourself.
Currently there are no similar looking kanji which exist in the WaniKani learning system