23 parts Ongoing Ryuuichi and his Younger toddler brother Koutaro recently lost both of their parents in a fatal plane crash. Later on, they were approached by Youko Morinomoya, the stern and strict chairman of an elite academy, who also lost her family in the plane crash. She decides to take them under her care.
Ryuuichi gets the duty of the babysitters club, which was formed to help the female teachers of the school. That's means he becomes the school's babysitter. There he meets a lot of toddlers like his brother. He also meet Kamitani Hayato who is brother of Kamitani Taka, one of the toddlers and becomes one of Koutaro's friends.
Ryuuichi and Hayato got the idea that they were at the same age and their are classmates. Time,Days, months past by the two didn't notice that they become closer until some happenings in their life that made their relationship changed.
"Let me help you for the rest of your life Ryuuichi. Let me stay by your side forever, please!"
"Kamitani.. Hayato." Ryuuichi's tears starts to fall down as Hayato hugged him tightly.
"That should be me Ryuuichi.. please.." Hayato pleased while crying to Ryuuichi.