My recommendation is for the first part only. Seheon loves playing jazz on the piano. But when he goes to a new school, Taeyi hears him playing and freaks out telling him to never play again.
What makes this great is the dynamic between the two mc's. They play off each other really well, giving the whole first part of the webtoon a romantic atmosphere.
Highly recommend you listen to the songs as he plays. Really adds something.
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Jazz for two