As a white-collar worker, I unexpectedly adopted a younger brother—Ling! Aya is not a likable guy. It's not that he is naughty (in fact, at his age, you shouldn't use that word), but he is not cute at all! As for why I am not cute, I will tell everyone one by one in the future... Later, the appearance of the well-behaved Cheng made me find the feeling of being a sister...