The Legend of War Beasts

[War Beast] + [Evolution] + [Family] + [Female Protagonist] + [Struggle for Hegemony] The male protagonist's soul traveled to a different world and vowed to climb to the top of the food chain in this life. He contracted a war beast, carefully cultivated it, and spanned an era; he met the heroine, made friends, and gained love and friendship; he worked hard, developed power, and led his family to rise. Compete with him as a beast? Looking for abuse. They will beat you in terms of quantity, but they will crush you in terms of quality. Comparing power with him? Finished. If you rely on the boss to protect you, he himself is the boss. Lock in his footsteps and watch how he defeats the strong with the weak, how he develops and grows little by little, and writes his own legend.