Kanpeki Onee-sama Mikogami Saya no Mujintou Haramase Shugyou ~Fufu, Genki no Ii Seishi da... Hayaku Watashi ni Tsuma no Akashi o Yadoshite Kure~

Protagonist Yosuke Ikeda was reminded of his own shortcomings in the daily presence of cool-headed, talented, universally popular lady Saya Mikogami. She saw him being humiliated for his lewd tendencies and decided to fix him up by taking a private holiday to an uninhabited island. At the same time as they trained Yosuke and Saya became lovers, as she showed him the ways of sexual discipline... a splendid baby-making life with the cool, perfect older girl!