True childhood sweethearts: no bloody misunderstandings, only a steady stream of companionship and growth.
The character design is contrasting and cute: an emotionally stable and gentle boy × a cheerful and straight-ball little sun.
Non-traditional salvation: not a condescending salvation, but the mutual proximity and healing of two warm souls.
Regarding age: Although the male protagonist looks more mature and stable, the two are actually the same age (emphasis added). They are pure childhood sweethearts~
Concept: Warm and healing