Responses
https://www.mangago.zone/read-manga/his_little_amber/
This one's close enough with the description
His little amber for sure, but this is also similar if interested: https://www.mangago.zone/read-manga/cat_in_a_cardboard_box/
It's not the his little amber it's the link you gave me thank you so much
I'm trying to find this BL where this guy goes back to his apartment and there's a box in front of his door with a baby tiger in it and he goes to sleep with it and it turns into a man that's all I can give for the information I don't even know if it's on here please try to find it