Professional boxer Sota Kusunoki has gained popularity for his fighting style, where he goes headlong into his opponents. However, years of fighting have taken their toll on his body, and he is forced to retire by a doctor's stoppage. He takes the opportunity of his retirement to marry his girlfriend, Sachiko, and start a new life, but he is completely useless in society and is made acutely aware of the harsh reality of his situation. One day, a mysterious man who claims to be a fan of Sota's receives an offer to fight in an underground martial arts tournament, where he will fight for a large sum of money and where his desires are thriving... The prospect of fighting once again revives his almost forgotten excitement, and his adrenaline surges as if to fill the emptiness in him. Will the madness and honesty of a man obsessed with fighting have a happy ending or a bad one?

A con man and a would-be filmmaking crew force themselves into the lives of two grief-scarred young women. But nothing is as it seems.

Yukina, who works as a call girl in the burbs just north of Tokyo, was sexually abused by her stepfather. Her younger stepbrother Minoru was also abused, but meanwhile he harbors feelings for her. He gets suspicious about her line of work after finding her call girl business card, but he also worries that he'll become the target of bullying at school.

School cleaner Nozomi Haruta was happy. She was supposed to marry her partner, her beloved, her soulmate, the handsome teacher Chitose Yokomizo, but when he secretly marries someone else, he ruins her dreams and breaks her heart. Also, maybe her mind? Seized by desperation, Nozomi photobombs his big wedding photograph by replacing the bride, steals the camera, and makes a run for it! Headlong into the path of a courier carrying Castella cakes! When she wakes up, she sees Chitose hovering over her, only it’s not him, but a being who calls himself Castella (as in the cake). For the next two weeks (the expiration date for the cakes), he will be Nozomi’s cake-based companion and help her get over her despair.

Our hero, called by a different name in each chapter of his life, becomes a J-pop idol, an outcast, a leader, and an oracle in this hundred-year chronicle spanning the past, present, and future. Through a chance encounter with a transfer student, he trains to become an idol, starting his search for self-identity and a journey toward greatness beyond superstardom.

Seijiro, born into a family of renowned architects, returns home after studying in Mexico to celebrate his grandfather's 80th birthday. While his relatives gather, he recalls a trip to take photos of ruins in Japan with Lana, a photographer he met by chance.