I was lied to about a confession by my childhood friend and was gloated at, so I was comforted by my male-daughter childhood friend♂ and opened a new door, but my childhood friend cuckolded my male-daughter, so I'm going to take her back.

Protagonist Abe Kazutaka had a false confession made to him by his childhood friend, and was even told "serves you right." In his heartbreak, he was comforted by the childhood friend's son, Ueno Rinne, and opened a new door, but what awaited Kazutaka the next day was the reality that Rinne had been cuckolded by his childhood friend.