SNOS-026 Tsundere Childhood Friend... Using Premature Ejaculation Improvement Training as an Excuse, She Jealously Initiates Intense Sex with Me Who Has a Girlfriend - Minamo Airi

The male protagonist already has a girlfriend, yet his tsundere childhood sweetheart uses "premature ejaculation improvement training" as an excuse to launch a jealous, proactive sexual offensive. She pretends to help on the surface, but in reality seizes the opportunity to express her dissatisfaction with the protagonist's girlfriend, employing various seduction techniques for intimate contact—from oral sex to cowgirl position—gradually deepening the physical and emotional entanglement, ultimately making the protagonist addicted to her body and unable to extricate himself.