Responses
Not sure but this is the author http://www.mangago.me/r/l_search/?name=YAMAMOTO%20Kotetsuko
I have not read it before but the title is Bokutachi Diary. Baka-Updates classifies it as josei. https://www.mangaupdates.com/series.html?id=107043
I was wondering if anyone can tell me if this is shounen ai or Yaoi? I don't think this has ever been translated.
http://st.cdjapan.co.jp/pictures/l/00/26/NEOBK-1685464.jpg