Neku Sakuraba, a 15-year-old boy with a hobby for music and graffiti, wakes up in what seems to be the Shibuya shopping district of Tokyo, Japan. With no idea why he's there, he opens his hand to realize he is holding a strange black pin. After flipping it with his hand, the thoughts of the people surrounding him begins to flow into his head at once. Surprised, Neku discovers he is able to read the minds of others and assumes it has something to do with the black pin he is holding. A cell phone starts to ring in his pocket, and he can't tell whether it is his or not. A text message appears: "Reach 104. You have 60 minutes. Fail, and face erasure. -The Reapers." After discovering he can't delete the message, a timer of 60 minutes imprints onto his right hand. Neku is in Shibuya to play the "Reapers' Game," which spans a total of seven days. All Players of the Reapers' Game have a black pin with a skull embedded on it. (Source: Wikipedia, edited)

There once lived a vampire known as Vanitas, hated by his own kind for being born under a blue full moon, as most arise on the night of a crimson one. Afraid and alone, he created the "Book of Vanitas," a cursed grimoire that would one day take his vengeance on all vampires; this is how the story goes at least. Vanitas no Carte follows Noé, a young man travelling aboard an airship in 19th century Paris with one goal in mind: to find the Book of Vanitas. A sudden vampire attack leads him to meet the enigmatic Vanitas, a doctor who specializes in vampires and, much to Noé's surprise, a completely ordinary human. The mysterious doctor has inherited both the name and the infamous text from the Vanitas of legend, using the grimoire to heal his patients. But behind his kind demeanor lies something a bit more sinister... [Written by MAL Rewrite]

After harboring an unrequited love for years, Naoya Mukai finally gets to date his childhood friend, Saki Saki. However, just as he tries to commit himself to this relationship, he receives an abrupt confession from Nagisa Minase. At first, Naoya tries to reject her but is soon overcome by feelings of not wanting to hurt Nagisa. Trying to avoid betraying his girlfriend's trust in him, Naoya thinks up a "solution" to make both girls happy—two-timing. Naturally, Saki rebuffs this idea, but through Naoya's and Nagisa's persistence, she reluctantly submits. With this, a three-way affair begins between Naoya, his girlfriend, and his "other" girlfriend, as they develop a relationship that deviates from the social norm.

Takuma Sakamoto is a hikikomori gamer who is mysteriously transported to the virtual world of his favourite MMORPG, Cross Reverie, with the appearance of his own character in the game, the Demon Lord Diablo. The two young girls who summoned him, the pantherian Rem and the elf Shera, attempt to use a spell to make Takuma their servant, but due to his magic ring with the ability "Magic Reflection", the spell rebounds, and both end up with magic collars stuck on their necks, thus becoming his servants instead. With a serious case of social anxiety, Takuma decides to act like his character while interacting with others, and makes use of his high stats and vast knowledge of Cross Reverie's lore to survive in his new environment, traveling along with Rem and Shera to look for a way to remove their slave collars, while helping them with their own personal issues that led them to summon him in the first place.