Ketai Kareshi

Shirasaki Hina dreams of a wonderful romance with her ideal boyfriend. A 3D cell phone app that whispers sweet words to her just like a boyfriend would, was developed based on Hina's fantasies. Even though Hina has a crush on Akaishi-senpai, she is being pushed around by the cell phone boyfriend born from her delusions! (Source: Shogakukan, translated) Note: Chapter count includes three extra chapters.