Chen Jiadi and An Xia liked each other, but no one said it. Chen Jiadi was diagnosed with brain cancer. Chen Jiadi finally died at the age of seventeen. Until his death, he never said "I like you" to An Xia.
Chen Jiadi never fulfilled his promise in his life and did not take An Xia to see the most beautiful sea.
Intention: I don't know, that's what I thought of