Little goblins are literally little... and they're green. Very little and very green. Reading the synopsis, my western thought process was hesitantly intrigued by the thought of a goblin/human pairing. I'm aware that this is my misunderstanding and that I'm completely at fault for it, but having a handsome human falling in love with a little green monster was what drew me in initially.
I was disappointed that she wasn't a western goblin at all, but just a human with enhanced senses.
I have no idea if his soul transmigrates with her, or if she just pair up with an entirely new ML every time. Also, she didn't fall in love with him in the first world at all! Maybe she did subconsciously, but the summary implied that she knew it before she moved to another world. The summary is completely misleading, and I don't appreciate it.
I also dislike the attitude of the ML in the second world. To be frank, I despised him. There's a fine line between dotingly overbearing and obsessively possessive, and 2nd ML jumped that line by miles. I'm currently on the 3rd arc, but I'm not sure if I'm going to continue.