M boy loves tickling and reacts with excitement each time his armpits are gently teased. Even in the mound position, as his sides are boldly stimulated further, his pleasure intensifies. After enduring the torment, M boy finally gets his chance to strike back. He retaliates by tickling Riona's armpits—Riona, sensitive to tickling, writhes helplessly and responds with irresistibly erotic reactions. In the finale, her nipples are thoroughly tickled to climax. Packed with Riona Suzushiro's unique charm and addictive expressions unseen in other AV works, this release delivers an unforgettable experience.