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You Promised Just One Thrust, Right...?
一挿しだけの約束だからね…？～あの子をオトす魔法の言葉～
A young man finds himself in a complicated situation with his childhood friend. After a series of misunderstandings, he ends up making a bold promise to her: just one thrust, and then they'll stop. She agrees, thinking it's a joke, but soon realizes he's serious.
As they navigate the aftermath of their impulsive decision, their relationship begins to shift. Old feelings resurface, and the line between friendship and romance blurs. With each encounter, they struggle to maintain the boundaries they set, but temptation grows stronger.
Now, they must decide if their promise was just a fleeting moment of passion or the start of something deeper. Will they stick to their agreement, or will one thrust lead to more?
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