Ever since her older brother died, Teru Kurebayashi has been watched over by the mysterious Daisy, whom her brother said would look after her in his absence. Though they communicate only through e-mail on her phone, his gentle, encouraging words have been a great source of comfort to her. Her life becomes slightly more complicated when, after accidentally breaking a window at her upscale school, she is made into a slave by the school janitor Tasuku Kurosaki, a rude, sadistic, minorly perverted Lolicon who has no qualms about lounging around while she does all the work. He's totally unlike her beloved Daisy; but little does she know that the two are, in fact, the same person.

There are currently nine volumes published in Japan. The series is also licensed by Viz and five volumes are out in America.

• Absurdly Powerful Student Council
• Almighty Janitor: Kurosaki is a former software engineer and an accomplished hacker/cracker who is not above making death threats to those who intend to hurt Teru.
• Almost Kiss: In chapter 20, Kurosaki tries to kiss Teru. They're interrupted by Riko.
• Alpha Bitch: Initially, the student council president Rena.
• Arson, Murder, and Jaywalking: Onizuka commiserating with Teru about Kurosaki: "He's lazy, unscrupulous, and perverted. Plus he can't tell jokes at all."
• The Atoner: Kurosaki, in creating Jack O' Frost and feeling guilt over his father being a spy, nearly commits suicide into thinking that would redeem his "sins." Souichirou stops him. He later feels that he cannot be forgiven for Souichirou's death, feeling responsible for it as Souichirou dedicated the remaining time of his life protecting Kurosaki until it wore him out.
• Badass: Kurosaki.
• Belligerent Sexual Tension: Kurosaki and Teru.
• Berserk Button: Do. Not. Mess. With. Teru. Kurosaki will get angry, and you won't like it.
• Bishounen: According to Riko, Kurosaki was one in the past.
• Bitch in Sheep's Clothing: Mori-sensei.
• Bland-Name Product: Teru and Kurosaki buy candy at a 7-10.
• The Cameo: Was that Leo and Yuiko we saw in the second panel?
• Cannot Spit It Out
• Cool Big Sis: Riko towards Teru and Kurosaki. She could have become Teru's literal Cool Big Sis because she was engaged to Teru's older brother, who untimely passed away prior to the story's beginning.
• Clothing Damage: Played for humor.
• Cuteness Proximity: Kurosaki has a hilarious one when he unconsciously brings a dog home during the rain in Chapter 28.
• Death by Origin Story: Played straight--Teru's older brother's death and before-death deal with "DAISY."
• Domestic Abuse: Played for Laughs.
• Double Entendre:

Kurosaki: ([about Teru]) She just exhausted herself and then passed out. It's happened tons of times before, and no matter what you do to her, she won't wake up... Riko: Heh, "no matter what you do, she won't wake up"... What exactly did you do? Up until now. Kurosaki: Huh? No, I mean... Could you stop emitting that killing aura? I'm not guilty (of very much)...

• Driven to Suicide: Kurosaki tried to commit suicide in the past. Luckily, Souichirou stopped him.
• Dude, She's Like, in a Coma
• Everyone Calls Him Master: Masuda, the manager at the restaurant Kurosaki normally attends and one of Kurosaki's confidants.
• Everyone Can See It
• Evil Costume Switch: Mori-sensei.
• Flower Motifs: Well, it is called Dengeki Daisy. The author often puts blue daisies in the story.
• Forceful Kiss: Akira steals Teru's first kiss in Chapter 32.
• I Want My Beloved to Be Happy
• Innocent Innuendo: Teru tells Riko about her night together with Kurosaki and she hilariously misunderstands.
• Jerkass/Jerk with a Heart of Gold:
  • No really. Guess who.
  • Souichirou, at least in the flashbacks where it's revealed that he's the one who made Kurosaki Daisy in the first place. He was nicer to Teru, though.
• Ill Boy: Souichirou, who had stomach cancer for half a year prior to his death.
• Interrupted Suicide: Kurosaki attempted suicide in the past but was stopped in Soichirou. In Chapter 35, Rena mistakenly thinks Teru is trying to commit suicide (following Kurosaki's disappearance) after the former spots the latter on the school's rooftop and "stops" her.
• Like Brother and Sister: Teru's initial view of her relationship with Daisy.
• Lolicon: Kurosaki is jokingly referred to several times as such by several of his acquaintances. However, he can only really be defined as one under the least pedantic definition of the term.
• Looking for Love In All the Wrong Places: Rena.
• Loves My Alter Ego: Inverted; To Teru, Kurosaki is both the school janitor and Daisy, the mysterious person who has looked after her ever since her brother died. Teru is in love with Kurosaki and Kurosaki is in love with her, but he doesn't want her to know that because he feels that he shouldn't love her while keeping that fact that he's Daisy a secret.
• MacGuffin: The virus code, "Jack O' Frost."
• Motor Mouth: Teru. Especially when she gets kidnapped by Arai-sensei, much to his annoyance.
• Mysterious Protector: Daisy.
• Obfuscating Stupidity: The school nurse Mori-sensei.
• Ojou: Rena acts like one, anyway.
• Panty Shot: Played straight and played with when a knife intended for Teru's person instead only gets her skirt.
• Playful Hacker: Kurosaki, to some extent.
• Plucky Girl: Teru.
• Rapid-Fire Typing: Kurosaki.
• Replacement Goldfish: Teru gets really interested in a hooded boy she meets three times because of his resemblance to her late older brother Souichirou. Turns out he's not such a good guy like she thought when he steals a kiss from her.
• Sacred First Kiss: Teru's "first kiss" was stolen by Akira.
• Shipper on Deck: Teru's brother shipped her with Kurosaki, which is saying something considering this is Souichirou. In a flashback in Chapter 38, Riko suggests for Kurosaki to ask out Souichirou's little sister, who Kurosaki has never met yet, but Kurosaki is against it, as he claims he's not a Lolicon and that the girl is probably an A-cup.
• Sickeningly Sweethearts: Kako and Ken.
• Sleep Cute
• Smoking Is Cool
• Sweet Tooth: Takeda admits to be one in chapter 12.
• Teacher-Student Romance: Arai-sensei and Rena. In spite of what happened, they still care about each other.
• Three Amigos: Souichirou, Kurosaki, and Riko had elements of this in the past.
• Tsundere: Kurosaki, even more so than Teru herself. Also, Rena. Souichirou showed signs of it as well in the past, acting strict towards Kurosaki, only to confess his worries over him later to Riko.
  • Fortunately, Teru is aware of Kurosaki's Tsundere tendencies, and she seems to deeply enjoy using it against him. Most prominently in chapter 41, which doubled as a Crowning Moment of Funny and a Crowning Moment of Heartwarming, all at the same time.
• Two-Person Love Triangle
• Would Hit a Girl: Kurosaki constantly threatens anyone who hurts Teru, girl or boy. He also makes true to his word by choking Mori and stealing her clothes after she stopped the Ferris wheel Teru and Akira.
  • Kiyoshi hits Teru to snap her out of her depression over Kurosaki disappearing.