Shinrigaku de Isekai Harem Kenkokuki

Unrivaled in the parallel universe by using psychological knowledge! A story with a new standard of romance! An unfortunate high school boy, Shinta Nanpa, loves girls but can't talk to them properly due to his female phobia. Shinta, who was sent to a parallel universe by chance, has to use the only weapon he has to start off, which is his psychological knowledge. His target is an elf, fairy, and a mermaid!? The story with a new standard of romance, starts here!! (Source: Square Enix, translated)