Shinobu Koi hodo: Sukisugiru Dannasama ni Dekiai saretemasu?

Ayame is a ninja-in-training, known among her village for being cheerful, strong, and fond of her food. She has been in love with Shoma, the village's top ninja, since they first met, back when she was a child. Happy enough with admiring him from afar, one day she finds out that he will soon be taking a wife. She decides to forget her feelings for him, and instead devote herself to her training. First on her list: the art of love-making. However, when the door opens, she is shocked to discover that her trainer is none other than Shoma...! His fingers begin toying with her...

(Source: Renta!)