Series by 犬上すくね

Kii, a mysterious girl, roams with Ken, a boy who can transform into a key, seeking people whose hearts are locked by emotional struggles. Together, they encounter a diverse cast—a man unable to propose, a student frustrated with her tutor, a BL writer in love with a regular guy—unlocking their hearts to reveal hidden feelings and resolutions. As Kii and Ken navigate their mission, their own bond deepens, blending fantasy, emotion, and human connection in a heartfelt tale of healing, love, and the power of opening up in a world of locked hearts.

Makoto Omaeda, a college student, is in a relationship with his high school sweetheart, Natsume Midorikawa, whose strong-willed personality often leaves him flustered yet devoted. His friend Yoichi Edogawa is dating Maho Otsuka, Yoichi’s former high school teacher, whose clumsy charm contrasts with Yoichi’s sharp wit. The two couples navigate the ups and downs of their relationships, blending everyday moments with playful banter. Natsume’s teasing tests Makoto’s loyalty, while Maho’s past as Yoichi’s teacher adds complexity to their dynamic. Their interconnected lives unfold through lighthearted and heartfelt interactions, exploring the quirks of young love.

Lukio, an ordinary high school student, encounters a mysterious accident and is whisked away by winged twins to Angel High School, a celestial academy for training angels. Upon waking, he learns he’s now part of this heavenly institution and meets Sari, the strong-willed student council president who knew him in life. The school’s rival, Fallen Angel High, led by the defiant Haru, challenges Angel High to a competitive duel called Ludus, entangling Lukio in their rivalry. Lukio navigates his new life with the quirky twin siblings Knoe and Fujiko, who brought him there, and the childlike yet powerful principal Gabriel. As he adjusts to angelic classes and events like a supernatural sports festival, Lukio grapples with his past connections and emerging bonds.