Honoka is an obliging girl, shrine maiden, and childhood friend. She's like a younger sister to Wataru. However, the naturally-talented Honoka must undergo (erotic) training in preparation to do battle with D4.
"N- Nii-san, more... Please give me more!"
The brave and innocent Honoka, before she even notices it, starts overcoming her shyness and expressing her own desires.
Honoka has her ass thoroughly teased, undergoes exhibitionist training, and has Wataru fondle her on a train...