Natsu no Kojin Renshuu

A young man spends his summer break practicing alone in the school gymnasium. His solitude is interrupted when he notices a female classmate also staying late for her own private training. They share awkward glances and silence, but an unspoken tension builds between them.

As the days pass, their accidental encounters grow more frequent, and the quiet gym becomes a stage for hidden desires. What begins as innocent practice slowly transforms into a secret, passionate affair that blurs the line between discipline and temptation.