A perfect life starting from kindergarten

After his rebirth at the age of 27, Lin Zhengran returned to kindergarten.
And has a straight male system.
"Brother Lin Zhengran, you are really good at playing the piano. Can you teach me how to play the piano?"
[Option 1: Of course, we can learn together. Reward: The angry stare of the girl’s father]
[Option 2: You are welcome, I am busy. Reward: The Tsundere Girl's Hatshoe]
[Option 3: No, because I want to teach prettier girls. Reward: +1 for temperament]
Just when Lin Zhengran was planning to quietly develop through life as a straight man, he discovered that his childhood sweetheart was even more weird than the system.

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