Sakurako and I have been in love for a while, and we were considering marriage. Today is the day I came to meet my girlfriend's family, and she told me that she also has an older sister who is a yoga instructor. And this older sister is a siscon... When I met Sakurako's parents, their expressions were very strange, and they vehemently opposed our relationship. That night, while sleeping, I vaguely dreamed of seeing Yuko shining some light on Sakurako. The next morning, Sakurako acted as if she didn't know me, and kicked me out. With a hunch of what might be happening, I stole Yuko's light. But because I didn't know how to use it, I couldn't make my girlfriend go back to normal. Unexpectedly, that older sister came to my house, searched for the light. While arguing with her, I accidentally hypnotized her and started a revenge plan. Just when I was feeling proud of my success, something unexpected happened...