#Kietai Boku wa Kimi ni 150-ji no Ai wo Ageru
#消えたい僕は君に150字の愛をあげる · きえたい ぼく わ きみ に ひゃくごじゅうじ の あい お あげる
est. Rough estimate based on volume count, reprints and magazine — not an official figure
External databases: AniList
How to compare editions, collected volumes and ISBNs / Sources, updates and corrections