Rakuen Danshi: Dare mo Shiranai Mou Hitotsu no Rakuen (2013)

In autumn of her second year of high school, the protagonist returns to the town that she hasn't lived in for 10 years.
Concerned about her shy nature she consults her childhood friend and receives some mysterious software.
It prepares beforehand hundreds of thousands of conversation patterns. Even people who are bad at conversation can succeed if they just choose one of the options that appears.
It seems she can finally communicate.
The protagonist is determined to work hard, and before she realizes she might not even need the software anymore.