A two-part story (both parts included) about a friendship from both perspectives.
Be warned that the first part might qualify as NTR depending on today's definition issued by the shadowy council of vague genre bullshit. If that isn't your thing or you just have a low tolerance for embarrassing self-pity, skip ahead to the second part, starting from page 17.
2016-08-29: Updated with a final page and afterword from the Kuzushiro's collection, Ryuuzaki-san to Torao-san.