I Will Love You Forever — Tatsuya Miyanishi

A female Maiasaura finds a lost egg in the forest and decides to look after it with her own egg. Surprisingly, a baby Tyrannosaurus hatches from the egg. The greathearted mother accepts and raises him as her own son, Heart. One day, Heart goes to pick berries and comes across another Tyrannosaurus. The foster son of the Maiasaura discovers his real identity. The fourth title in this acclaimed Tyrannosaurus series, I Will Love You Forever delivers a heartwarming story about adoption with vivid, brightly colored illustrations and endearingly drawn characters.