My Genius Boyfriend's IQ Drops Only for Me

Synopsis

My boyfriend, Toru, is a science grad student. Normally he's smart and eccentric, but when he's exhausted from research, he shows a side only I see. He becomes a total baby with zero IQ, obsessively seeking out my breasts. Seeing him suckle with a serious face while saying "Thank you for the boobs" is just too cute. One night, Toru came home at his limit. I, An, welcomed him without a bra to pamper him, but a call from the lab ruined the mood. We were left frustrated and separated for a week. Finally, on the night of our reunion, he made a shocking request: "Today... I want you to lick my nipples." Wait, his? I knew he loved breasts, but now he's interested in his own? I have to fulfill this brilliant boyfriend's first "request" until I'm a total mess...