Kazuo is a hikikomori who finds a respite from his self-imposed isolation each Spring during the Hanami season, signing up for tourist trips to have fleeting relationships with foreign women. But upon meeting 'Sumire,' a gloomy writer seeking to escape her life, Kazuo is strangely confused about finding someone who embodies the pinnacle of everything society expects of him. Yet, she came to Japan with the idea of fading away at the most beautiful moment of her imagination, claiming this would be her only decision.

Their relationship blossoms with the subtlety of the cherry blossoms, a bond that transcends their cultural differences to become genuine mutual support and affection. In each other’s company, they find the strength to face their realities, understanding that there is no life without poison, just as one cannot enjoy the arrival of spring without the end of winter