@OsTB most likely, Japan's judgmental society wont leave something that misleading to their real life. one of the reason birth rate decline is because the fact raising kids and paying huge bills for various things in Japan isnt that easy and smooth.
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for example, you most likely wont be able to rent apartment if you are still underage unless you have guardian consent. renting a room in love hotel would also ask you to show ID card if you look underage.
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im not gonna surprised if artist's twitter is on fire because of this. probably because most readers didnt sign up for teen pregnancy manga