One night in the forest, a young woman discovers two "apples" lying on the ground during her walk. Overjoyed, she picks them up to take home to her husband, noting she must hurry because bears liked to come out at night. Suddenly, the woman is pursued by a "bear" and she begins to run, although knowing deep down that the two fruits were the bear's beloved treasures. She stumbles through the forest, lost, and begins to cry along with the bear and the fruits. Finally, however, she arrives home safely.
Upon arrival, the woman shows the apples to her husband. Horrified by the sight, he reminds her that their own children are already dead, instructing her to return these ones to their real mother. Realizing that she'd kidnapped a baby boy and girl, the woman screams in horror at her "unforgivable sin." As her husband insists that she can still fix it, the woman admits that it is already too late; outside the house is the dead "bear," in reality the children's now dead mother. Beside the corpse is a glass bottle filled with milk.
Tale of Abandonment on a Moonlit Night describes a later event concerning Adam, Eve, Hänsel and Gretel; it recounts the later lives of the children with their foster parents as well as the parent's own deaths by the hands of their children.
The song's title, "Moonlit Bear", refers to the "bear" that chased the song's central character, Eve Moonlit; the word "bear" also means "to carry", referring to the consequences Eve would bear for her sin.
Like Tale of Abandonment on a Moonlit Night, Full Moon Laboratory, and Escape of Salmhofer the Witch, the story takes place on a moonlit night; the moon is often associated with madness and is the origin of the word "lunacy".
The song's English title, "First Episode", refers to its depiction of the creation of the Original Sin, the origin of the vessels of sin.
The glass bottle present in the song seems to be the same one seen in Tale of Abandonment on a Moonlit Night; a similar glass bottle appears in Regret Message.
Eve's belief that the "right path" had already been lost parallels Tale of Abandonment on a Moonlit Night, where Hänsel and Gretel express uncertainty on whether or not they travel along the "right path"; both situations involved outward lunacy on a moonlit night through Held's Forest.
Toward the beginning of the original song PV, before the first lyrics are heard, the questions "What do you hope to the moon" and "Do you wish it for the person who loves" are seen.
Both songs also share the same melody during that part, although at a different pace.
The opening melody of Tale of Abandonment on a Moonlit Night is heard at the end of Moonlit Bear, during the credits; similarly the song's opening caws of crows is heard at the end of Escape of Salmhofer the Witch.