Sokuseki Ad-Lib Lover 

"I'm going to become the best comedian out there!" After making this promise with his grandma, Asahi sets out to attend a comedy vocational school. And on his first day, he gets unexpectedly partnered with another guy for his acts. And that guy is Minase, a very good-looking but sarcastic guy. They were very reluctantly paired together for their bit, but ended up hitting it off. They hit it off SO well, that they got carried away and kissed each other during the bit! (Source: Kadokawa, translated) Note: Includes an extra chapter.