Hatsune no Naishou is a collection of Leaf's mini games that any Leaf's fan should not miss. The CD contains several cute mini software including some mini games, screen saver, wallpaper, and CD player. The mini games packed in the CD include a mini action game called Heart By Heart with characters from To Heart, a mini RPG game called Leaf Fighting 97, To Heart Omake, and of course the adventure game Hastune no Naishou.