Quintessential Quintuplets

High-school student Futaro Uesugi is an academically gifted student who leads a difficult life—his mother has died, he has no friends, and on top of all that, his father has incurred a large amount of debt.

An opportunity presents itself when the rich Nakano family transfers to his school. Futaro is promptly hired as a highly-paid tutor. However, much to Futaro's dismay, he discovers that his five charges—identical quintuplet sisters of varied personalities—have no interest in studying at all and have abysmal grades. Some of the quintuplets are against having Futaro, whom they view as a stranger, in their apartment, but Futaro's diligent tenacity gradually convinces those girls to accept him and improve their grades.

The outline for a story about "a group of quintuplets falling in love with the same person" existed even before the serialization of Haruba's previous work, Karma of Purgatory (2014–2015), but was rejected by his editor-in-charge. A year later, as Karma of Purgatory was finishing, Haruba pitched various ideas to the editor, and the "quintuplets" concept was accepted. This was not without some reservations, as it had been viewed negatively in two to three of the serialization committees, so it was decided to have a one-shot manga published first. Said concerns were ultimately unfounded as the one-shot received positive reviews, and so was approved to become a serial.

Haruba finished drawing the last chapter on February 10, 2020.

The Quintessential Quintuplets had 2 million copies in circulation by January 2019; it reached 3 million copies in circulation by February 2019; it had over 15 million copies in circulation by April 2021; over 16 million copies in circulation by March 2022; and over 20 million copies in circulation by December 2022.

In Japan, the manga series was the fifth-best selling manga in 2019, and the third-best selling manga in the first half of 2020, behind Demon Slayer: Kimetsu no Yaiba and One Piece.