Soda Cis Isekai De, Kawaii Imoto Sodatemasu [Light Novel]

[Machine Translation] Jas, a former young man, finds himself reborn in a different world where he does not even understand the language. As a baby, he is smitten by the cuteness of his twin sister, Selle, who sleeps next to him, and vows to use the memories of his previous life to raise her as a beautiful and respectable lady as an elder brother. And with all the warm love of his parents and maids, Jas learns a lot while slowly raising his little sister! This baby-raising fantasy thoroughly explores everything from good morning to good night, including naps, night cries, and bedtime wakings! All newly written! Includes an extra short story and a 4-panel manga!

気がつくと、言葉さえも分からない異世界に転生していた元青年・ジャス。赤ん坊となった彼は、隣で眠る双子の妹・セーレの可愛さにメロメロになり、なぜか覚えていた前世の記憶を活かし、兄として彼女を美しく立派なレディに育てようと誓う。そして両親やメイドさんたちの温かな愛情を一身に受け、ジャスはたくさん学びながら妹をじっくりと育てていく!お昼寝・夜泣き・オネショなど、おはようからおやすみまで徹底追求した赤ちゃん育成ファンタジー!全編書き下ろし!おまけ短編と4コマ漫画も収録!