Itsuki is a lonely man who is single all his life. That should be the case, and he lived without any effort, saying that his life, which had bad sexuality and did not go well, was "because of the bad world." However, his only comfort was his niece, who was also this existence. If you lose with a slingshot and get sick, call and give a blow job, and if you get horny, call to give priority to this even though you have something to do and have sex. My niece who is too obedient ... also abuses this compassionate heart and makes a tadapako distorted uncle's sexual life.