A passionate courtship. Erina, a female student, has someone she likes. That person is her homeroom teacher, Umeda-sensei. She realized that she had fallen in love with the kind and caring teacher. But Erina has one problem. She wants to "eat" the person she likes so much that she covers the other person's lips with her mouth, drooling and devouring them... a so-called "koiki●gu kiss." After confessing to her teacher, Erina can't help but give him a koiki●gu kiss. Since that day, she can't control her love and causes trouble for her teacher. She doesn't really want to cause trouble, but she can't stop herself... that's how much she likes her teacher. One day, Erina finds out that rumors are spreading about her relationship with her teacher, and she decides to give up for her teacher's sake... Forbidden love, uncontrollable feelings... A coming-of-age drama about a girl who is confused by her unusual sexual preferences, but honestly faces her feelings of love, and engages in a bizarre kiss.