Anal

The main character is Shizahara Yui, a virgin masturbating every day, while fantasizing wild things. However, it's not enough just to masturbate and she decides to recover in the park, where the locals come for the sake of acquaintances...

Tumbling into the cave, a young man who lost his memory explores a cave guided by a crystal and joined by 3 beautiful women. Somewhere along the way, his quest evolves from finding his memory to saving the world...... Will he save it with good or...