;)

Seme unintentionally let other alphas know that Uke is in heat on the train. Seme 'saves' him from them, but he is the real danger.

Seme has a hypnosis app that works when he takes a photo of someone. It only works 4 times so 4 Ukes (technically 5 coz theres a 3some).

Gods with pet humans.

Seme's father makes a sculpture based on Uke. The father dies and Seme inherits the mansion along with Uke.