I grew up with sisters Aika and Risa and secretly loved Aika, the older one, but neither of us confessed before reaching our thirties. After Aika insults me during an argument, Risa comforts me, confesses her feelings, and becomes my girlfriend. The moment jealous Aika hears the news, she starts flaunting her huge braless breasts and proposes that I practice sex with her because inexperienced Risa might get hurt. Even with Risa nearby, I repeatedly give in. When Aika finally asks whom I truly love, I admit it has always been her. I tell Risa the truth; she storms out but says we should have been honest from the beginning. At last, Aika and I become a couple...