Looking for a BL

I don’t remember it but the ML talked in English and it had mint colored font , and he was in rut and the Main character was an omega but he was recessive so the ML didn’t notice until they had sex and then he got pregnant and they marked eachother and then the male lead came back and found him because he was angry someone marked him in rut and the ML has dark hair and the Main character has light hair. This is really discriptive but I just don’t remember the name.