At first, Damian only looked after Kana because of a request from Lily, a subordinate of Rano who was very loved by Bunga because Lily always defended her in front of Alva. According to Damian, he just wanted to repay Lily's kindness.
However, it turned out that after Damian decided to take care of Kana, he decided to live even longer because he had to keep his promise to Lily to take care of the woman's daughter. Until Kana finally grew up, all of Kana's growth and development, her activities, her life, and her habits were watched over and guarded by Damian by deploying his subordinates. Until one day, Lily said that Damian seemed to love her daughter.
Damian finally realized why he had postponed his wish to die. Taking care of Kana is just an excuse because Damian has fallen in love with Kana. From then on, Damian decided that Kana would be his first and last love.