According to Shueisha Super Dash Bunko, Matsu Tomohiro
's light novel "Papa no Iukoto wo Kikinasai!
(Listen to me girls, I am your father!)" was announced to get an anime adaptation. Two manga adaptations will be serialized in Jump Square and Cookie magazines from this month.
Papa no Iukoto wo Kikinasai! novel official website
Segawa Yuta is a freshman of a university. He lost his parents when he was small and was raised by his sister Yuri. Yuta has been living alone since Yuri got married to a middle aged man when Yuta was a junior high student. One day, Yuri visited Yuta's apartment and asked him to take care of her three daughters while Yuri and her husband were on a trip. He unwillingly accepted the job but the plane Yuri took went missing. In order to prevent the daughters from being adopted separately by the relatives, Yuta decided to take in all the three girls. A life of a strange family in a tiny apartment begins. (The elder two of the daughters are stepchildren of Yuri's husband. The smallest one is Yuri's child.)
Source: Super Dash Bunko
Papa no Iu Koto wo Kikinasai!