"She appears when he starts masturbating".
Shirahama Honami is a 22 old virgin. The goal of him who has never even masturbated before is to jerk off to his coworker Sakurai-san. However, his good intention is interrupted by the sudden appearance of Shinri, who claims to be his guardian deity. Whenever Honami tries to masturbate, Shinri materializes out of nowhere and Honami gets played by her.
Will he be able to masturbate, or even find his way to sex--?

【オナニーを始めると出現します。】22歳にして童貞の白浜 帆南（しらはま ほなみ）。マスターベーションもしたことがない彼の目標は、同僚の桜井（さくらい）さんをオカズにして最後まで達すること。しかし、突然現れた自分の守護神だというシンリーに良いところを邪魔されてしまう。自慰をしようとするとなぜか実体化するシンリーに振り回される帆南。果たして彼は、オナニーはおろかセックスまで辿り着けるのか――！？