After Rimuru's encounter with Shizu-san in the manga, he learns how to mimic a human form. However, the body...was that of a three-year-old child!? With chibi-Rimuru and his friends unleashed from the Great Forest of Jura, maternal instincts hit in the “Tensei Shitara Slime Datta Ken” Official 3rd Spin-Off!

An anthology of 15 one-shots based on Himegoto (TSUKUDANI Norio). 1. Josou Yamemasu! (女装やめます!) 2. Kaguya-sama ga Miteru (かぐや様が見てる) 3. Present (プレゼント) 4. Nichiyoubi no Himegoto (日曜日のひめゴト) 5. Kono Naka ni Hitori, Otokonoko ga Imasu. (この中に一人、男の娘がいあす。) 6. Atsui? Kanbyou (あつ～い? 看病) 7. Arikawa-ke no Shokutaku (有川家の食卓) 8. Niizuma x Otokonoko = Saikyou (新妻 x 男の娘 = 最強) 9. Taisetsu na Oyoufuku (大切なお洋服) 10. Nouryousai (納涼祭) 11. Hime Inu Keikaku (ひめ犬計画) 12. Sono Mama no Kimi de (そのままの君で) 13. Himegoto Bro's 14. Morimori Ohime-chan (盛り盛りおひめちゃん) 15. Pantsu o Shokusu toiu Koto (ぱんつを食すということ)