Suiei Choukyoushi ~Oyako Shuuchi Lesson~  

水泳調教師～母娘羞恥レッスン 

I am a swimming instructor. Actually, I just enjoy watching girls in swimsuit every day. There are two girls, Mizuki and Ryouka, who take part in my swimming lesson. You know Ryouka is Mizuki's mother. I am in love with Mizuki, but it seems she hates me. Ok, I will get you somehow. I just starts spying on Ryouka....