Ta-tan

Fifteen years ago, Atsushi Ueda, a dull, 28-year-old, virgin man, took in a baby from a friend. The friend had committed a murder and was in prison. The baby's name was Suzu. Atsushi raised Suzu as his own daughter. Suzu called her father "Tatan." Ueda never told his daughter anything about her origins. Suzu knew nothing about it. A heart-tugging comedy about a father and daughter with an unconventional history!

(Source: Big Comic Original, translated)