Growing up, Nasa Yuzaki was constantly mocked for his peculiar name, driving him to strive for a more noteworthy reputation. His outstanding academic performance, ranking first in the nation's mock exams, secured his spot at his desired high school, validating his hard work.
One fateful night, on his way home, Nasa unexpectedly notices a girl across the street that immediately captures his attention with her overwhelming cuteness. Unfortunately, his infatuation blinds him to a speeding danger approaching, putting his life in peril. Thankfully, the girl intervenes, saving him from death's grip. Overwhelmed with emotion, Nasa musters the courage to confess his love to her. In response, she accepts his proposal but under one condition: marriage. Nasa, deeply in love, agrees without hesitation before passing out due to his injuries. However, upon his awakening, the girl is nowhere to be found, leaving him alone and heartbroken.
Determined to find the girl who holds his heart, Nasa forgoes his previous life ambitions and dedicates himself to the search. Despite years passing, he finds no trace of her until an unexpected visitor knocks on his door, changing everything. This visitor is none other than the love of his life, now his wife, forever changing the course of his world.