I Love My Sister's Boyfriend

Fatal meetings: Lovers of Judo Mitsuka looked forward to finding his true love since she began high school. One day, walking through the park, he meets a very cute boy who raised on the bench. The next day, a new coach arrives at the Judo club from Mitsuki. And who appears? Cute Dunda on the bench, of course! Her smile makes her heart beat, and her name on his lips makes her face to blush. But there is only one small problem ... It turns out that this guy her sisters. What can a girl do?