Zoku Shishunki Miman Okotowari

Asuka, who lived in Hokkaido with her mother, relocates to Tokyo in search of her father, whom she has never met. Upon arriving at his house, she discovers he is absent, and only his children are there, who also claim they have never met their father. Deciding to stay with her newfound "brother" and "sister," Asuka begins her quest to find their shared father. Her two "siblings" live alone, and complications arise as Asuka and her "brother" start developing feelings for each other...

(Source: MU)