Shuro's character relations: 

Orihara Keiji: Convinced he has a secret BDSM fetish.

Fumihana Sorano: Thinks she needs to loosen up. 

Jack Whitestone: Constant rival. 

Soga Emishro: Thinks he's the smartest one in their club.

Kon Yayoi: Admires the effort she puts in.

Fujiwara Isana: It's complicated.

Hayato Arashi: Keeps her guard up around him.

Yamamura Seishiro: Thinks he has the most potential in their club.