"Tadaima no Kiss wa Rental Okusama to" centers on the unconventional relationship between Itsuki Amakawa, a young man burdened by familial expectations, and Riri, a rental wife he hires to fulfill his family's demands. Itsuki, pressured by his parents to marry, opts for a pragmatic solution by engaging Riri's services to pose as his wife during family gatherings. The arrangement is strictly professional, with Riri providing the appearance of a dutiful spouse while maintaining emotional distance. However, as the two spend more time together, the boundaries between their contractual relationship and genuine feelings begin to blur.

The narrative explores the complexities of their evolving dynamic, delving into themes of societal expectations, personal identity, and the nature of love. Itsuki, initially reserved and focused on appeasing his family, gradually opens up to Riri, revealing vulnerabilities and aspirations. Riri, on the other hand, maintains a professional demeanor but struggles with her own emotional barriers, shaped by her past experiences. Their interactions oscillate between moments of warmth and tension, highlighting the challenges of navigating a relationship built on pretense.

Supporting characters, such as Itsuki's family members and Riri's colleagues, add depth to the story by providing contrasting perspectives on marriage and relationships. The series balances lighthearted humor with poignant moments, creating a narrative that is both engaging and thought-provoking. Through its exploration of the protagonists' journey, "Tadaima no Kiss wa Rental Okusama to" examines the intersection of duty and desire, ultimately questioning whether a relationship born out of convenience can evolve into something authentic.