https://www.asianfanfics.com/story/view/1104718/crushing-on-the-substitute-teacher-jikook

credits - pastel-rainbows

Jungkook gets asked by his older brother Namjoon to look after his nephew, but there is a problem... hes a barley funchoning 22 year old eating cereal out of the box. Then he meets the substitute teacher at the primary school, Park Jimin. Suddenly he feels a lot better about babysitting.