Donghae is a college student spending his summer over his cousin's home for a month to play with him and take care of him. He had no problems with that because he absolutely loves and adores little Jeno, who people kept saying looked exactly like him when he was younger. He was happy to take care of that little ball of sunshine who looked like a small puppy most of the time.

Hyukjae was a friend of Siwon, who had a younger brother named Jaemin. The boy was bright and enthusiastic with things that interest him. He gets curious about a lot fo things around him, and he was also smart. Sometimes, Hyukjae comes over to Siwon's place to play games with him and his other friend Kyuhyun. He has met Jaemin quite a few times and although he was not that good with children, he thinks he knows how to handle them. Based from Siwon's stories and ramblings. They haven't played with the little boy that much, but that was because he would rather beat Kyuhyun's in Play Station.

Jeno and Jaemin are friends because they go to the same kindergarten school. Jeno tripped over a small rock on the playground on the first day of classes, and Jaemin ran up to him and used his bunny designed mini towel to wipe the dust and soil on his knees. The same towel was also used on his face when Jeno began to cry, but he stopped crying when Jaemin hugged him. Since then, Jeno stuck with Jaemin and they spent most of their time playing and eating snacks together. Their parents were delighted because the boys instantly became bestfriends, and they would go to each other's house most of the time during summer breaks. 

They spend a day together, one bright summer day, and Donghae accompanies Jeno to his bestfriends' house. Hyukjae was bored at home and went to visit Siwon's house, and unfortunately, Siwon had to go out to buy the kids lunch and snacks so instead of his friend, Hyukjae saw a handsome and dazzling guy sitting in the living room couch. 

It was at that moment, he knew, he found the one for him.