Karasuma Koudai is an introverted university student who streams spicy ASMR roleplays online once or twice a week. With his view counts failing to increase, he is on the verge of quitting when he makes a startling discovery about one of his most active chat participants. The cheerful, popular, and outgoing Minami Masaya, who is Karasuma's polar opposite in every way, is an avid listener. Minami makes a red-faced confession that he has been using Karasuma's ASMR recordings for his own self-pleasure, stating plainly, I can't come without your voice.

Taken aback by this admission, Karasuma impulsively offers to help Minami in person. What begins as an arrangement fueled by Karasuma's sense of superiority as he witnesses Minami's lurid reactions to his voice soon evolves into something more complex. Karasuma finds that simply talking is no longer enough and develops a genuine affection for Minami, desiring to touch him gently rather than just command him from a distance.

The central storyline follows these two university students as they navigate an intensely personal relationship that blurs the lines between online performance and real intimacy. Karasuma's initial ego boost transforms into a sincere romantic attachment, while Minami's dependence on Karasuma's voice deepens into a mutual connection. After they become lovers, Karasuma embraces the role of a devoted partner, becoming sweeter and more thoughtful as he devises scenarios specifically designed to tease Minami in just the right ways. Their blissful routine is interrupted by the sudden appearance of Karasuma's older brother, introducing a new source of conflict and potentially threatening the private world the couple has built together.