TsumaSho

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.

Despite being born into a noble family, Miyo lost her birth mother at a young age and grew up being abused by her stepmother, stepsister, and father. When she finally receives news that she's to be married off, she finds out that her husband-to-be is Kiyoka, a soldier with a reputation for being cruel and heartless. In fact, he's had numerous previous fiancées who have all fled his household; none lasting even a mere three days. Resigned to the fact that her family had abandoned her, Miyo knocks on the gate of the Kudou household to find herself greeted by a beautiful man with pale skin. Despite the poor treatment she receives from her husband-to-be during their first meeting, Miyo is unable to return to her old home and spends her time cooking and doing chores. However, as the days pass, Miyo and Kiyoka being to slowly open their hearts to each other...

Kazuki has been awaiting 10 years for the day when her neighbours moved back to their old house. She has a crush on Yuuji, whom she considers as her first love but to whom she never managed to express her feelings for him before they moved out. Yuuji often comes over to play with Kazuki, Kazuki's older sister Hatsune and Yuuji's sister Marie when they were kids. Her ideal depiction of Yuuji was soon shattered when he turned out more than she had expected, him acting all ecchi during their reunion. With their parents off in South America, both families must learn to live with each other and rekindle the childhood feelings they shared together. Things get even more crazy as they attend the same school.

On Christmas Eve, Hiro Hirono's bike is stolen by a girl chasing a thief who stole her purse. He gives chase and finds her unconscious and his bike ruined. The girl, Miyako Miyamura, soon awakes and the two begin to talk. After making sure she is okay, they end up spending Christmas Eve together. Later, Hiro finds out Miyako attends the same school as him and they begin to spend more and more time together, Miyako developing affections for Hiro. Kei Shindou -- Hiro's childhood friend who has long held a crush on him -- begins to become jealous and a love triangle follows. The series also tells the story of Renji Asou. One day, he meets Chihiro Shindou, the twin sister of Kei Shindou, at an abandoned train station. Even though she's very shy, they get along pretty well and begin meeting at the same spot everyday. However, Renji finds out that Chihiro was in a car accident years ago and as a consequence she suffers from a disability: her memory lasts only 13 hours. Nevertheless, after learning that Chihiro's dream is to write a novel, Renji finally decides to help her fulfill her dream while also trying to make her overcome the difficulties imposed by her condition.