I'm not good at writing story descriptions, but here's the idea: Ayanokoji Kiyotaka ends up transmigrated into Wataru Sajou's body at a bizarre-and frankly disgusting-moment. From there, the story unfolds.

Quiet, average, and perfectly content staying uninvolved, Ayanokouji Kiyotaka never expected his school life to intersect with romance - especially not other people's. Yet somehow, the girls around him keep losing at love, staying close to their crushes even after the outcome is decided, smiling through conversations while someone else steps into the role they wanted. And without ever meaning to, Kiyotaka finds himself in the same place - present, included, and uncomfortably close to affection that has nothing to do with him. He never set out to pursue anyone or take part in the competition, but that doesn't stop him from being treated as though he lost all the same. Can someone who never joined the race endure being placed in the role of a losing heroine? It seems he's about to find out.

A chaotic slice-of-life AU set inside ANHS, where a growing alliance of girls somehow ends up turning Ayanokōji Kiyotaka's daily life into a full-blown route war. From rumors, rankings, and emergency meetings to jealousy, secret strategies, and romantic misunderstandings, this story follows the wild everyday chaos of the girls as they navigate school life, friendship, rivalry, and the ever-expanding mystery of Ayanokōji-kun's love routes.

From the White Room to the ruins of the Surface, Kiyotaka Ayanokoji awakens in a world he already knows too well. He knows the Raptures. He knows the Ark. He knows the girls this world will break. But this is not the same Ayanokoji. No longer the student shaped only by cold calculation, he arrives here as a 24-year-old man who has already returned to the White Room, endured years within the political world, and learned the weight of leadership, image, responsibility, and human attachment. He is calmer, sharper, and far more dangerous than before-not only as a strategist, but as someone finally capable of building something that lasts. Armed with perfect memory, political maturity, and complete knowledge of the original route, Ayanokoji enters Goddess of Victory: NIKKE as the one variable the story never had: a Commander who already understands every tragedy waiting ahead. But knowledge alone is not why he was brought here. Bound by the mysterious Victory Mandate, he cannot knowingly abandon a fate that can still be saved without paying a price. So when Marian's death should mark the beginning of the story, he chooses to defy the script. That single choice changes everything. This is not merely a retelling of a broken route. It is a different path entirely. Now, caught between the corruption of the Ark, the ambitions of the Big Three, the horrors of the Surface, and the fragile hearts of the Nikkes who begin to gather around him, Ayanokoji sets out to do what this world never truly allowed: build the final route. Not just a safer battle. Not just a stronger squad. But a real place to live. A refuge. A fortress. A future. At Outpost 01, the masterpiece of the White Room will attempt something far more difficult than victory. He will try to create happiness in a world designed to consume it.

"Ayanokoji Kiyotaka, a masterpiece of the fourth generation of the White Room and a high schooler of Japan's most prestigious school, is suddenly killed one day by unnatural causes, sending his soul to the afterlife where he encounters a mysterious goddess."

When a nuclear explosion brings down a private aircraft en route to an international academic summit in Russia, the 1st Year Students of ANHS finds themselves stranded in the desolate Arctic-injured, disoriented, and hunted. Cut off from civilization, surrounded by snow and silence, the students are forced to face a brutal new reality. Supplies are scarce. Temperatures are lethal. And outside, armed soldiers move with sinister intent, and other things warped by radiation stalk the wreckage under a dead sky. But survival isn't their only concern.

Hi, my name is Ayanokouji Kiyotaka, and I'm currently trying to live out my new life as a normal high school student. You can guess how that's going---spoiler: it's not going well. Like a row of dominoes, one after another, people keep coming to me with their tangled romantic problems. Is this some sort of cosmic push for me to play therapist, to heal their wounds and dive headfirst into my own romantic life? But, honestly, normalcy would be nice--- *** Nah, Kiyotaka isn't Nukumizu. He'll have his own hobby different from Nukumizu, and of course, the most obvious one; a story different from Nukumizu.

The outbreak began without warnings. Hours after escaping the White Room amidst the chaos, Ayanokouji Kiyotaka finds himself alone in the mountain ranges of Saitama. With no supplies, no allies, and no knowledge of how far the infection has spread, he is forced to survive in a world where the rules he once mastered no longer apply. But he wasn't the only one who escaped. And some classmates haven't changed at all---even as the world burns.

A new spring breeze blows through Advanced Nurturing High School. Among the new students, a boy with exceptional abilities stands out. Akuhara Kurou. It seems that he is not only Ichinose Honami's childhood friend but also harbors complex feelings toward her... With Ayanokouji Kiyotaka, who has become a bit of a pushover, as his close friend, Kurohara Kurou's life and the people around him are chronicled in this story, where Ichinose Honami is treated somewhat roughly. ──Note that the original protagonist has a complicated and fractured relationship with Ichinose Honami due to past troubles, and is an extremely troublesome character── ※The original protagonist is truly a troublesome person, and the treatment of Ichinose is also quite harsh. ※As the "Yandere" tag suggests, the personalities of some characters have drastically changed. Original Title : ようこそ一之瀬帆波の幼馴染がいる教室へ Original Author : クリスマン Art Cover (Pixiv) : /users/24746718 Syosetu : /novel/343768/