A mysterious young man named Yasashi Yasamura appears only before people carrying doubt or unease. He possesses a strange power that, combined with his gentle words, soothes their troubled hearts. No one knows who he truly is or why he chooses to help strangers in distress.

The story begins with Ai Hara Saya, an overworked editor at a publishing company who cannot say no to requests and has long exceeded her limits. One night she meets Yasamura, and his kind words begin to untangle the stubborn knots in her mind. He then moves on to help others: a high school girl who feels unfeminine because of her height and devotion to basketball, a sixth‑year real estate salesman overtaken by a junior colleague’s sales, and a thirty‑year‑old hairdresser who feels left behind as friends marry and have children. Each person’s inner conflict is addressed in an episodic manner, with Yasamura arriving exactly when they need him most.

As the series progresses, a reporter named Nanami finds herself frustrated by being unable to meet Yasamura—and that very frustration allows her to finally encounter him. She begins to follow him to write an article, and together they meet more people carrying hidden worries: mediating a sibling quarrel, advising a clerk afraid of loud voices, and smoothing the relationship between a daughter‑in‑law and mother‑in‑law. Through these interactions, Nanami uncovers clues about Yasamura’s true nature, such as a mysterious lemon‑candy that seems connected to his past.

In the third volume, Nanami pursues the candy’s origin and recalls her own unresolved grief: a father she parted from in anger before his death. With Yasamura’s help, she comes to understand both her father’s feelings and her own buried memories. Among those memories is a childhood encounter with Yasamura, hinting that his role as a healer may stem from a deeply personal source. The manga works toward revealing just who Yasamura is and why he is so extraordinarily kind.