Okaa-san Futari Itemo Ii kana!?
お母さん二人いてもいいかな!? · おかあさん ふたり いても いい かな
est. Rough estimate based on volume count, reprints and magazine — not an official figure
Overview
Manga artist and illustrator Nakamura Kiyo (Nakamura Ching) takes an honest look at her life as the stepmom to her wife’s three children. A non-fiction look at a lesbian couple’s life in today’s Japan. (Source: Yuricon)
Source: AniList
External databases: MADB · AniList
How to compare editions, collected volumes and ISBNs / Sources, updates and corrections