His name is Sun!!! He's a boy who lives in the underground world and has never seen the sun in his life—but that all changes today! In this game, he's a monster boy who sets out on an adventure to find the exit from the forgotten underground world while fleeing dangerous monsters. ‘While fleeing’? Why?

Because the sun wouldn't hurt even a tiny ant (poor sun). Now, can you find the exit in this dangerous underground world using only a single lantern and your wits? Give it a try. Sex Included!? Horror Eroge
Find the exit in the ruined caves!

Or else you'll become a cute monster girl's naughty toy.