The protagonist takes on a task: win over the assigned characters and earn a hefty reward.
Every day, he has to play a special role.
On the first day, he is the home tutor to a devilish young master. The young master can't stand his tutor and comes up with ways to drive him out every day. As luck would have it, the protagonist knows nothing about magic. But no matter: before long, the little devil won't be able to live without his teacher's private lessons.
On the second day, the protagonist becomes an angel, with the pure and dignified Archangel as his guardian.
The Archangel is brilliant and learned, and even holds the key to all forbidden knowledge of Heaven and Earth, including the lore of demons. The newly born angel clings to the Archangel each day for lessons, looking pure and innocent, while privately taking the opportunity to study every kind of forbidden magic.
On the third day, he is a nanny hired by the dragon clan to care for their hatchlings. The protagonist tugs at his maid outfit and looks at the hatchlings before him, all different colors, breathing fire, spitting water, or wailing, then meets the troubled gaze of the Dragon King.
The protagonist diligently completes his tasks, learning the knowledge of angels and demons, teaching his demon student, helping the Dragon King care for the hatchlings, and occasionally taking on the replenishment task for all three.
Soon, he has learned demonic script, angelic script, and dragon script, mastered all sorts of magic, and collected a great many gems and gold coins along the way.
Until one day, the Archangel discovers traces of demonic energy on his sweet, innocent student. The demon spots dragon scales left behind on him...
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One day, the game ends, and the protagonist is surprised to discover that this world has a hidden side he never knew about. But when danger comes his way...
The protagonist, now a Grand Magus and an honor student in Heaven: It doesn't seem very dangerous.
The protagonist is a bit like a robot, and though he dates everyone, he thinks it's just part of completing his tasks. He believes he's doing an excellent job of fulfilling his duties as a lover, even if he has a few too many targets. He can also master three unfamiliar nonhuman scripts to complete his tasks, and become an honor student in Heaven through studying.
The current scenarios are "demon," "angel," and "dragon," though the role of hatchling nanny may be separated from the maid role, with the maid assigned to the vampire scenario instead.
Theme: Changing one's circumstances through one's own ability to learn