Kamisama

When Akio was in elementary school, he built a 'temple' like he was making a secret base. Now in high school, Akio casually stops by the 'temple' he had long forgotten one day, and there he finds a mysterious boy praying fervently... With no place to belong at school or home, the boys continue to wander the area, eventually throwing themselves into a vortex of sex and desire...

(Source: Yosumi, translated)