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During the hot summer months, Sugiyama heads off with his tennis team to a secluded training camp in the mountains. While he focuses on improving his game, his step-sister Mio has an entirely different kind of “special training” planned for him.
But things get even more complicated when his doubles partner, Saeki, accidentally witnesses their secret sessions and starts developing some very naughty ideas of her own…
Date: June 1, 2026
