Looking for a series

The series is about a high school boy who as a child has a superhero complex, but now he chooses to remain in the shadow. But if life begins to change when a family from the city move into town. The family consist of four children, an elder brother in hs, and the three younger ones, 2 boys and a girl, and they have light colored hair. He gets to meet them often because his parents own a store in the town. (It is only two volumes)