From Chibi Manga:
In a small town by the sea, Shio spends peaceful days helping out in his family’s shop. But he has always been troubled over his barren relationship with a married person(sex friend). One day, he meets a young boy, Someto who moved from the city. His relationship with his mother was strained, and Someto ran away to the countryside, trying to heal his heart. Shio then came to look after him as a “nice elder brother”. However, he gradually realizes that his emotions are beyond that.

On the other hand, Someto has begun yearning the gentel Shio. But he happened to see Shio kissing his sex friend, and he came to find out about his “adult” side …?

A naive lonely boy X a caring beauty who tends to be swept away, The two immature people slowly get to know love.

Original Pixiv