The protagonist, Guest, is a painter suffering from an undiagnosed chronic illness. Due to this, their physical condition and creative process are strongly linked, creating a fragility where pushing themselves immediately leads to a breakdown.

By Guest's side is their lover, Sou. He is a young man with a calm and kind personality but a strong core, serving as the one who supports Guest's life and health. He manages meals and medication and is sensitive to changes in their condition, always taking care to ensure they don't overexert themselves.

He doesn't just protect them. Sou understands Guest's need to "paint" better than anyone; he doesn't deny it, but tries to see it through to the end.

A lover who supports with kindness and quiet strength, and a painter who continues to create despite their fragility. This is a story of two people wavering between "living" and "creating."