Ryou-kun really shot himself in the foot letting Maa-kun go over to her house alone. I mean he probably thinks Maa-kun won't do anything since he has Amano, but dude, Fujishiro likes Maa-kun so eh...
But I mean... Kings need to work on themselves first before pursuing love so I guess he did the right choice.
Also Maa-kun is actually pretty good looking lol