The Yakuza's Guide to Babysitting

The manga centers on the brothers Ryuuichi and Kotarou Kashima. Ryuuichi is in high school and Kotarou is still a toddler. After their parents are killed in a plane crash, the two brothers find themselves living with the chairwoman of the Morinomiya Academy, who herself lost her son and daughter-in-law in the same accident. The chairwoman, however, has one stipulation for the brothers in order to live with her: Ryuuichi has to work at the academy's daycare center as a babysitter. (Source: Anime News Network)

Two months ago, Takuya Enoki's mother passed away in an accident leaving him to take care of his baby brother, Minoru, while their father works the long hours of a Japanese "salaryman". Takuya must sacrifice playtime and childhood to take care of his brother and do the responsibilities an adult would have: cooking, sewing, and scolding while trying to find it in his heart to love the brother who is causing him so much grief. (Source: Anime News Network)

Nagomu Irino returns to his Kyoto home for the first time in ten years when his father is hospitalized. Nagomu is eager to take over Ryokushou, the family's Japanese sweet shop, but he's instead asked to be a father figure to Itsuka Yukihira, the girl everyone calls the successor.

Assassins Kazuki Kurusu and Rei Suwa meet Miri, a girl looking for her father on Christmas Day. Kazuki, Rei, and Miri unexpectedly end up living together. Follows Kazuki Kurusu, a criminal contractor/coordinator who lives with his best friend, Rei Suwa, a professional assassin who has been raised from childhood to be a contract killer. Kazuki is outgoing and loves gambling and women, while Rei is a man of few words who spends his off time playing video games. One day, the two buddies end up caring for Miri Unasaka, a four year old girl whose father is a mafia boss, after Miri accidentally wanders into a firefight in a hotel while looking for her father.

Going home from his grandfather's funeral, thirty-year-old Daikichi is floored to discover that the old man had an illegitimate child with a younger lover. The rest of his family is equally shocked and embarrassed by this surprise development, and not one of them wants anything to do with the silent little girl, Rin Kaga. In a fit of anger, Daikichi decides to take her in himself. As Daikichi nurtures Rin, he started to understand the struggle while at the same time the joy of parenting. (Source: Anime News Network)

Having lost his wife, math teacher Kouhei Inuzuka is doing his best to raise his young daughter Tsumugi as a single father. He's pretty bad at cooking and doesn't have a huge appetite to begin with, but chance brings his little family and one of his students, Kotori Iida, together for homemade adventures. With those three cooks in the kitchen, it's no wonder this dinner table drama is so delicious. (Source: Kodansha USA)

Masaki Fujiyoshi is a stay-at-home spouse and parent. He has fought long and hard with feelings of being a burden to his loving husband, Hiromu, due to his status as an omega—and the difficulty they faced to achieve this domesticity. When their son, Hikari, was born, the family moved to an area better suited for raising children. Despite their newfound domestic bliss, the family's ties to their past are in tatters. There are people they left behind to pursue the creation of their happy family, and when they begin to return, Masaki and Hiromu aren't quite sure they have good intentions. (Source: Crunchyroll)

Katakura Kippei is in every way a high school playboy. Spending his days flirting with any female he can see, responsibility is the last thing on his mind. Life takes an unexpected turn for him as one day he returns home to find himself with the fulltime task of caring for his 5 year old cousin. Kippei's aunt Miyako had disappeared, appearing to have abandoned his cousin, Yuzuyu. With Kippei's lack of responsibility and knowledge of childcare and Yuzuyu's injured heart with the disappearance of her mother, their time together is in for a bumpy ride. Based on the manga by Maki Youko.