he's not madoka's current bf, he just took that photo with her when she was drunk in a drinking party. He's going out with the guy with glasses but apparently that guy (glasses) likes hazuki and they're going out because he looks similar to hazuki, that explains why he said he was a substitute. And i guess he approached everyone around hazuki since the glasses guy wants to know how hazuki's doing. Hope this helps, i'm sucks at explaining bruh

can someone explain about madoka's current boyfriend, what he want with makoto and who's that guy wearing spectacle pretty please