The narrator knows his girlfriend’s best friend as Nishiyama Aika, but the world knows her as popular porn star KAWAKITA SAIKA—and he has even masturbated to her videos. After catching his girlfriend cheating and sinking into despair, Aika comforts him, and their relationship suddenly becomes sexual. Living under one roof and fucking the famous star feels like the best time of his life, but as he drowns in lust, he begins to forget that she is a person with feelings of her own.