The games are primarily action role-playing games. The player takes on the role of the protagonist, "Yue," defending the last stand of the town as part of quests given to them by locals during the death epoch involving recruiting members, growing, and gathering various resources to craft equipment.

ONLYUP SNOW is a challenging parkour game. Begin your journey in a snowy, icy area, then climb across skyscrapers and tricky platforms to reach the summit. One mistake can send you back to the start, making patience, speed, and focus your greatest allies.

Moxiangshan Girls' High School, a private girls' school located in the suburbs, has been known for its excellent facilities and high tuition fees since its inception. It is known as a "noble school" because of its high tuition fees. Yun Xinyao, a "problem girl" who was admitted at the request of her mother who hoped that her daughter would become a phoenix, gradually came together with Jiang Xiyue, who was admitted as a special student, through a series of coincidences during the entrance ceremony. Yun Xinyao, who is usually cold and aloof towards others, is gradually moved by the sunny girl who entered the school as an outsider, and begins to admire her. However, as school life unfolds, Xiyue makes other friends, and the time they spend alone together becomes shorter and shorter. "If only I could be the only one by her side..." Yun Xinyao thought to herself. Once such an idea takes root in one's mind, it is impossible to shake it off. Finally, triggered by that encounter on the hill behind the school, the pure longing that had once been in her heart gradually began to twist and turn into malice. And so the story begins.

Turn-based combat & erotic sex! Along with her childhood friend Haru and a talking furball (rabbit?) god, Sayaka lives a peaceful life, but when an earthquake strikes, aggressive spirits suddenly appear and her world is torn apart.