Since she was young, Ririka has looked up to her older stepsister, Mao, like an elder sister. As Ririka grew older, she began confiding in Mao about things she couldn't even tell her parents. Mao came out as a lesbian at 18 and has since been enjoying love and sex with women. Ririka, envious of Mao, gradually begins to see her as something more than just a stepsister...
I Energy
