27-year-old Ritsuka Shida expects her boyfriend to propose... until he suddenly dumps her and cuts off all contact. She complains about it to her friend, who suggests another man her age? Wataru Minase. Wataru is Ritsuka's co-worker, and he gets results. But, he's always immature and teases her. One day,when Ritsuka goes to a mixer, she finds Wataru there, too! She gets dead drunk, so Wataru has no choice but to take her to a hotel to sober up. When she cries to him about the shock of being dumped, he comforts her? Then he kisses her. His gentle caresses feel amazing... but it isn't enough...! She doesn't want to date him, but she can't get enough of him, either.