Natsuiro Kokoro Log

Yoshito meets his match when senpai Kisara defeats him in a fighting game tournament, earning him mandatory enrollment in her cyber-research club. As the club grows with the arrival of childhood friend Kuon, reliable younger sister Rin, and classmate Kotone, an unexpected opportunity arises. During summer break, advisor Kanae requests his assistance testing a love simulation game—with a twist: the female characters are controlled by the club members themselves. When Yoshito's in-game avatar develops an AI mirroring his personality, the girls shed their everyday facades, revealing their genuine feelings through virtual interactions. Blurring the lines between reality and simulation, he discovers hidden emotions beneath their surface. Their summer unfolds in a tale where pixels meet hearts.