The unknown pleasure is drilled into her innocent body...

The Ice Noble's lewd fingers dye the senses of her innocent body before their wedding. Sarah, a young woman who grew happily under the doting affection of her father and three older brothers, was suddenly proposed to by Josse, the best friend of one of her brothers. They ended up formally becoming engaged. She moved into Josse's manor to undergo bridal lessons as expected of a noblewoman, but it turns out she's going to share a bedroom with him! "Don't worry. I'll teach you everything." Josse had been like an older brother when she was a child, teasing her about being a tomboy, but his sudden apparent desire for her scares her. And yet, as he teaches her every night about pleasure, she begins thinking about him as a man...