I don't remember much of it so the description is vague.
I just know that there is a group of friends. And one friend has a pet reptile(not a snake or tortoise). That one friend's parents are going to move out of the country. The friend wanted to stay. And he did stay in Japan but he is left alone, luckily he has his friends with him.
This is not near the beginning of the manga, it is in the later chapters.
TIA. And Good Luck!!

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