The Hidden Dungeon is a place of legend where rare treasures and items are hidden. Nor, the third son of an impoverished noble family who's lost the one job offer he had, was lucky enough to hear about this dungeon. He then acquires a skill that allows him to create, bestow, and edit skills... and in order to use it, he needs to accumulate points by carrying out such tasks as eating delicious meals and doing sexual things with alluring members of the opposite sex.

Who is the real you? The "Tasokare Hotel" exists in a state of twilight limbo, allowing souls caught between the afterlife and the world of the living to rest. Neko Tsukahara arrives with no memory of who she is or how she came to be there, and is shown to a room filled with items relating to her past. As she searches for a way to remember who she was, a certain incident confronts her.

Who is the real you? The "Tasokare Hotel" exists in a state of twilight limbo, allowing souls caught between the afterlife and the world of the living to rest. Neko Tsukahara arrives with no memory of who she is or how she came to be there, and is shown to a room filled with items relating to her past. As she searches for a way to remember who she was, a certain incident confronts her.

A Kiss Note is a powerful notebook that makes anyone who has their name written together will instantly fall in love if they kiss each other regardless of any circumstances. This magical and very familiar item belongs to an angel named Guri whose job as cupid is to create couples. However, she accidentally writes down Aino Seiji, a regular high school student, and unless he kisses someone, Guri will die. She convinces Seiji to go kiss his crush, Hiyama Akane, the school's popular girl who turns out has even stronger feelings for him, bordering on obsessive and psychotic. Eventually Akane and Seiji come together but not before Guri decides that she likes Seiji as well. What seems awesome to most guys becomes hell for Seiji who just wants a normal relationship with girls.