In order to be promoted to a full-fledged succubus, an apprentice succubus must take a test to make a specific man ejaculate 10 times... And the person chosen as his partner is a young man with ejaculatory dysfunction. Despite being a high-difficulty exam, the succubus manages to succeed with her amazing techniques and signature intense climax. Meanwhile, the young man improves his ejaculation problems through their play... However... once she drains his life energy (vitality), he dies... Their decision is...
