My Girlfriend is a T-Rex

Humans and dinosaurs peacefully co-exist in our modern age. One night, Yuuma Asahikawa meets the feral T-Rex, Churio. Follow the lives of (secret) ex-delinquent Yuuma and the very Cretaceous Churio as they spend their days together!

Sanzo's Pixiv Comic: http://comic.pixiv.net/works/1224