[Sennen Teikoku (Mitsui Jun)] Yamawarashi (Onyoku Burabura Shounen Bibouroku 4) [Hikaru Scans]

Deep in a fog-shrouded mountain spring, two carefree brothers spend their days bathing in the nude — but they're secretly the legendary yamawarashi mountain spirits, and the older sibling uses the mist as cover to indulge his voyeuristic lust while watching his oblivious little brother play. The teasing escalates when the younger boy bends over to ask if a 'bug' is still on him, pushing his flustered big brother to the edge. These playful sprites have a fearsome streak too, striking trespassing loggers with lightning before settling back into the water, where a hard poke against a belly leaves one of them the 'happiest yamawarashi' in the three kingdoms.