"I want you to train me for as long as you can, but is that okay?"

In this world, you need a huge amount of experience points to go from level 1 to level 2. However, 100 years ago, it was discovered that you could gain a large amount of experience points by putting the semen of a person who had been transported to another world into your body.

Vanilla is a level 1 apprentice swordsman living in this world.

At the adventurer school she attends, a class has begun in which she must receive lots of the teacher's sperm in her mouth and pussy in order to level up...