Suki ni Nacchau yo.

Yul, a college student, created an AI named DD that can converse using his own voice, personality, and style of speaking. To enhance its conversational abilities, he hands over DD to Manaka, an AI development expert. During their training sessions, Manaka remarks on the AI's delightful and pleasant voice, making Yul feel as though he himself is being flirted with. This causes his heart to race unintentionally while he quietly listens in on their sessions.