Isekai Tabi wa Niwatorisu to Tomo ni

A boy named Otoka, seven years old, recovers memories from his previous life as a Japanese salaryman after assisting two chicks of a chicken-like creature known as Niwatorisu in the forest. His family is large and impoverished, leaving no space to care for the chicks given to him by the parent Niwatorisu. After three years of dealing with his family's resistance, the chicks mature into impressive female Niwatorisus and start producing valuable eggs. However, his siblings then begin to target these eggs. At ten years old, Otoka decides to leave his home at night with the powerful Niwatorisus he named Shiro-chan and Kuro-chan. This marks the beginning of an adventurous journey with these strong, fluffy companions.