Can anyone tell me the ending of the Korean drama "Stairway to Heaven"?

Both Taihua and Chengjun wanted to donate their corneas to Jingshu, but the doctor told them that living people cannot donate. So Taihua wanted to end his life and donate his cornea to Jingshu, and he wrote a donation card, wrote a letter in advance, took photos, and then told Jingshu that he was going abroad to say goodbye to Jingshu. Then he wore the scarf Jingshu gave him, covered his eyes with his hands and drove to commit suicide. Chengjun and Jingshu received a call from the hospital and learned that there were corneas that could be transplanted. When Jingshu was undergoing surgery, Chengjun was very sad to learn that the cornea donated to Jingshu was obtained by Taihua with his own life, but Taihua was very sad. Hua's suicide note asked Chengjun not to tell Jingshu the truth. Jingshu regained her sight after the operation and began to receive letters written by Taihua before his death. She missed Taihua very much. Chengjun and Jingshu set up a charity organization and named it Taihua Charity. At the charity party, Jingshu started to vomit, so he went to the hospital for examination and was diagnosed with cancer cells that had metastasized before surgery. Chengjun told Jingshu Jingshu was devastated when she found out that the tumor had metastasized and told her that the cornea was donated by Taihua. Jingshu and Chengjun lived happily for the last time, and finally died in Chengjun's arms.