Usan Eomneun Ae

Summer, who grew up in a harmonious family, often took care of Soo-Wan, the boy living upstairs who heard the sound of his wife fighting every night. When she started working part-time at an amusement park, she gave Soo-Wan a ticket when he said he wanted to go to the amusement park with his mother. After a while, Soo-Wan and the woman came to the amusement park and were happy to see them. However, she was flustered by the woman's unexpected behavior...

(Source: Naver, translated)