Does Having a Girlfriend Make You a Winner in Life?

After graduating, this science-and-engineering nerd with a laid-back, homebody streak lands a decent research job. Dissatisfied with the fact that he hasn't touched a girl's hand in twenty years, he transmigrates to another world and catches girls (?) again and again, eventually grasping the true art of flirting. P.S. The novel also has a minor subplot. Interested readers can look into it.