"If I Go to Another World, I'll Be Alone"

At 28 years old, the protagonist is a loner attempting to correct his communication disorder. Then one day, a turning point arrives. Following an invitation, he finds himself in a fantasy world that resembles an RPG. He does meet girls. However, with his unfortunate communication skills, the protagonist remains true to his loner nature. He may or may not become overpowered in this fantasy world with the power he has obtained.