I'm wondering if it's that same situation as Chika from "Sayonara Alpha" b/c he kept going into heat every time he met with Haruka, his fated partner. That may explain y Hibiya kept going crazy every time Yamagi came close to him.
I guessed coz Yamagi is an Alpha? And Hibiya is uhhhh 'transitioning ' (dunno if it's the right word) from being a Beta to Omega.
I'm wondering if it's that same situation as Chika from "Sayonara Alpha" b/c he kept going into heat every time he met with Haruka, his fated partner. That may explain y Hibiya kept going crazy every time Yamagi came close to him.