The Otouto no Otto series consist of 3 lgbt books written by Gengoroh Tagame. Otouto no Otto, Gengoroh Tagame first wrote My Brother's Husband, Volume 1 and most recently published 弟の夫 3 [Otouto no Otto 3]

• Otouto no Otto Series Order

We get the question all the time "What order should I read the Otouto no Otto series?". We would recommend you read the Otouto no Otto series in order by series number which is:
• 1.   My Brother's Husband, Volume 1 Book
• 2.   My Brother's Husband, Volume 2 Book
• 3.   弟の夫 3 [Otouto no Otto 3] Book