I'm Well-Behaved. Please Love Me, Sis

[Both pure] [Both strong] He is mild-mannered on the surface, but brutal, cold-blooded, and merciless beneath it all.

"You fool. See you in the next life."

She is a cool and innocent little rabbit on the surface, but a sly little fox underneath. She is a master of disguise.

"Make you fall for me? All I have to do is crook a finger, and someone will still lie awake all night~"