Qwaser

After graduating from high school, Jun-Seong moved down to his grandfather's house in the countryside. Then, U-Ju comes to visit him. Using a wish bet from their high school days as an excuse, U-Ju decides to stay at Jun-Seong's house for a month. One ordinary day, U-Ju asks Jun-Seong, "Do you think we're friends?" U-Ju had always been hard to read, but meeting him again made him even more difficult to understand. Even his unexpected question.

(Source: Ridibooks, translated)