For those wondering, in the first chapter flashback it's mentioned that Koki was (still is?) in college while Akira was in middle (junior high) school. No definite age, but my guess is that he's at least in his twenties.
For those wondering, in the first chapter flashback it's mentioned that Koki was (still is?) in college while Akira was in middle (junior high) school. No definite age, but my guess is that he's at least in his twenties.