Himitsu de Shussan suru Hazu ga, Gokujou Shachou no Shuuchaku Ai ni Tsukamarimashita

"Have I seriously fallen in love with a guy for the first time ever?" Haruka can't help but be drawn to the beautiful and mysterious Ren, whom she met at the bar. For some reason, she ends up spending the night with him, even though he always says mean things to her. Then, before she knows it, she realizes that she has really fallen in love with him. Just thinking about him keeps her up at night. But then Ren disappears... Source: BisouBisou Comics