3D Kanojo: Real Girl follows Hikari Tsutsui, a socially awkward otaku who prefers the world of anime and video games to real life.
He finds himself thrown into an unexpected situation when he's paired with Iroha Igarashi, a popular and somewhat infamous girl.
Despite his initial reservations and preconceived notions about her, Tsutsui starts to develop feelings for Iroha.
The anime explores the challenges and triumphs of their unconventional relationship as Tsutsui navigates the complexities of real-life romance and tries to overcome his insecurities, while Iroha attempts to connect with him and draw him out of his shell.
It's a story about a 2D-loving boy entering the 3D world of relationships and the girl who helps him along the way.