Ore no Mono ni Narinasai.

From Renta!: Kei is a super-popular, charismatic model with an attitude. He could have anyone he wanted, but he has his heart set on Nanami, his awkward cousin and roommate! Nanami can be harsh at times, but Kei sees that deep down, he's actually a sweetie who worries about people; he just can't express it. Kei thinks that's just adorable, and he's tried so many times to make Nanami his, but there's a reason his cousin never takes him seriously...! Starved for true love, this ultra-possessive supermodel is both beauty and the beast! From : The brutish, possessive love story of a super model starved for true love?! I am the amazing, extremely popular model of Karisuma Models, KEI (Toudou Kei). I would like my roommate, and ineloquent cousin, Nanami, to be my lover! He walks around, pretending he’s really badass, but he’s a worrier at heart, and whenever I see him like that, or showing this awkward kindness that he has, I just love him, love him, love him…I’ve tried to seduce him more than once. But there’s a reason he won’t take me seriously?! Includes an extra. *heart**heart**heart*