Kimi to Boku no Platonic

Suenaga, who has lost confidence in his social interactions, is so moved by Koba's performance at a university drama club performance that he decides to join the group. Koba has an unapproachable air about him, but he's sincere and kind, and he accepts Suenaga's shortcomings, like not being able to read the atmosphere.

Because of that, Suenaga finds himself wanting to know Koba more deeply. Then, one day, a drunk Koba tells him that he's asexual but not aromantic. Suenaga has a sense of embarrassment when he glimpses at Koba's inner self, and he feels emotions he's never felt before. He thinks that these feelings will only cause him trouble, but his feelings for Koba are already beyond his control...

(Source: Kaiohsha, translated)