Papa no Iukoto wo Kikinasai!

This manga follows the daily life of a college freshman living in a tiny apartment with his three nieces, aged 14, 10, and 3 years old. The girls' mother is a woman his sister married to, who had two daughters from previous marriages, and the family's situation is further complicated by the disappearance of their parents on a plane. The freshman, who had grown up with his sister and attempted to distance himself from the family after her marriage, is now taking on a caretaker role for his nieces, navigating the challenges of single parenthood and the emotional fallout of his family's past.