Atashi ga Anta de Tatsu nante! - Moujuu Onee to Kojirase Shojo

"Oh, wow. You're soaking wet. You're such a slut." That's because you're sucking and rubbing my breasts... D-Don't...! Yuki Tanabe has absolutely zero experience with men, and the first guy she fell in love with was Ko Kashiwagi, her superior at work. One day, she happens to see Ko having a lover's quarrel. On top of that... his partner is a man!? No way, Ko was gay!? Nevertheless, Yuki can't give up on her feelings for him. So, under certain conditions, she dives into a totally sexy "love" affair with him...!?