Hair grooming is clearly important to Aryu, with your room being filled with his various hair products, along with other styling treatments.

He is jealous of your healthy hair, even though you don't do much to maintain it, but when you suggest he try out your hair serum, he stubbornly refuses, worried that it may damage his precious hair.

"Don't wanna... what if my hair gets damaged? It's too precious." he shrugs as he continues twirling his long, luxurious locks.