After getting stood up for a movie date, Fumihiko Matsumaru, a marketing employee, is on the verge of discarding his tickets when a girl persuades him to let her join instead. With the lively and aspiring voice actress, Aka Onda, as his unexpected companion, Fumihiko's evening takes an unexpected turn. As they head home together, they realize they are neighbors. The next morning, Fumihiko awakens from a nightmare to the sound of sirens and rushes out to find Aka's apartment ablaze. Offering her shelter at his place, their bond deepens, culminating in a night of intimacy. This event intertwines their personal and professional lives, as they navigate a secret cohabitation following their impulsive encounter. To complicate matters, Aka lands a role voicing the mascot Fumihiko created for his company's latest project. Striving to conceal their unconventional living arrangement, they stand by each other through the challenges of their careers.