Board Thread:General Discussion/@comment-4436931-20180928004853/@comment-9623384-20181006155955

I think they want to mislead us.

In the VA credits, the young-younger one was listed as Ichihoshi's younger brother but the young-older one was not listed. (The present Mitsuru has a different voice actor from his young self.)

Maybe Ichihoshi's younger brother and Mitsuru is the same one and they didn't list young-older one's VA on purpose.