"I was excited because of Kana-san. Please take responsibility ..." Tanaka, who had come to visit his friend Morisawa's house, had long admired Morisawa's mother, Kana. Tanaka, who was worried about Kana, who was so beautiful and gentle that she fell in love with her every time she met, sneaked out of the room and went to see Kana. Then Tanaka discovers an unexpected secret and approaches Kana with his weakness as a shield.