6 decades books

This super handsome guy who is cold and unapproachable to outsiders, why does he become a spoiled and childish little boy when he''s with her? Not only does he constantly tell her what she can and cannot do, but he also secretly kisses her without saying anything, and even insists on sleeping in her bed?! Okay, okay! To be honest, she''s also afraid of sleeping alone, but why did he tell others that she''s his girlfriend? That clean and pure boy gave her the most precious ring; that flirtatious and explosive young master, however, is guarding his body like jade for her. What on earth is going on?! Cupid has unknowingly arrived by their side, but a certain someone hasn''t noticed yet. How much longer will this rich and handsome young master have to wait?