"Faster than a Kiss" is a shoujo manga series written and illustrated by Miko Yokote. The story centers on Fumino Kōzuki, a high school student who lives a quiet and uneventful life until a sudden twist alters her circumstances. After losing her parents in an accident, Fumino is left to care for her younger brother, Subaru, while struggling to make ends meet. Her life takes an unexpected turn when her homeroom teacher, Akiharu Sakuragawa, proposes a solution to her financial troubles: a marriage of convenience. Sakuragawa, who is significantly older than Fumino, offers to marry her to provide stability for her and Subaru, despite the unconventional nature of their relationship.

The narrative explores the evolving dynamics between Fumino and Sakuragawa as they navigate their new roles as husband and wife while maintaining a teacher-student relationship at school. Fumino initially struggles with the arrangement, feeling out of place and uncertain about her feelings for Sakuragawa. Over time, however, she begins to develop genuine affection for him, though their relationship is complicated by societal expectations, age differences, and the challenges of balancing personal and professional boundaries. Sakuragawa, while initially appearing aloof and pragmatic, gradually reveals a caring and protective side, showing his commitment to supporting Fumino and Subaru.

The series delves into themes of family, responsibility, and the complexities of love, particularly in the context of an unconventional partnership. Subaru plays a significant role in the story, serving as a bridge between Fumino and Sakuragawa and highlighting the importance of familial bonds. The manga also features a supporting cast of classmates and colleagues who contribute to the development of the main characters and provide moments of humor and conflict.

As the story progresses, Fumino and Sakuragawa face various challenges, including misunderstandings, external pressures, and their own insecurities. Their relationship evolves from a practical arrangement to a deeper emotional connection, with both characters learning to trust and rely on each other. The series balances lighthearted moments with more serious themes, creating a narrative that is both engaging and heartfelt. Through its exploration of love and family, "Faster than a Kiss" offers a nuanced portrayal of relationships and the ways in which they can grow and change over time.