The story is set in New York, which is lit up with Christmas lights. Tokyo Metropolitan Police officer Akari Kido is directing traffic while on her international exchange training program, when a witch-like character pulls a "Christmas Party" prank. Just before a runaway trailer truck smashes into Akari, a mysterious girl suddenly appears and shouts, "I'm going to protect New York and Akari!"
 
(Source: Anime News Network)

Second part to Monster Strike 2. 
Ren and his friends race to save the world from the apocalypse prophesied by the monster Nostradamus. When Mana discovers the truth about her origins and her role in the events to come, she becomes the key that could change everything...for better or for worse. 
Unlike its predecessor, The Fading Cosmos is not animated in full CG, returning to the 2D/CG mix used in the first Monster Strike season.

When D'Artagnan went to Tokyo for a little fun, she spotted an unforgetable sight: Lucifer singing while basking in moonlight in a park. From that moment, no matter if she was asleep or awake, D'Artagnan's heart would not stop throbbing for some reason. 

One day, D'Artagnan sees a concert by the popular idol act Angely Diva at her friend Izumo's invitation. There, she resolved to follow her idol dreams, and the story of song and miracles begins.
 
(Source: Anime News Network)

Monster Strike 2 special episode for Golden Week 2017.

"Change the world with music? Foolish."

Lucy's world stops after her band disbands. Meaningless days pass, until she meets her cousin Lucifer and his bandmate Ibaraki Doji. They ask her to join their indie band, the "Wicked Pistols".

Lucifer talks about his dream of going major after winning the MONSTERS ROCK competition, only for Lucy to reject him outright. However, Lucy's heart begins to thaw after a certain event...

(Source: XFLAG via ANN)

An episode acting as a bridge between season 1 and season 2 of Monster Strike.

- A strange phenomenon is overtaking the world?! -

After defeating the War Gods, Ren and his friends are living the dream. It seems like they've finally managed to regain their normal lives. However, a mysterious girl by the name of Pandora appears, bringing with her a box that must never be opened. An unfortunate incident results in the box opening (of course), setting the world up for some big changes...

(Source: YouTube)

The episode follows Ren on his vacation in Okinawa. There, he meets a mysterious girl.

The second season of Monster Strike. 
 
Monsters are just a daily fixture of life these days. Ren, Aoi, Akira, and Minami have taken it upon themselves to clear the neighborhood of violent monsters. Days pass, until a transfer student from America, Mana Livingston, appears in their class. Mana quickly becomes a friend as the gang bond over their monsters. But a creeping shadow begins to lurk in the darkness, a harbinger of the danger to come. A new chapter of Monster Strike is about to be written! 
 
(Source: Crunchyroll) 
 
Includes episode 0.

The Monster Strike film will feature a character named Lucifer.

An anime adaptation of the Monster Strike mobile game by mixi. The protagonist, Ren Homura, returns to the town of Kaminohara, where he once lived. But did he really live in this place before? A nagging feeling tugs at his memories. Meanwhile, a strange game is forcefully installed onto his smartphone - a game called Monster Strike. A gauntlet of battles await him. Through the fierce fighting, he pieces together his scattered memories while uncovering the truth of the game. He's supported by his companions: Aoi Mizusawa, Akira Kagetsuki, and Minami Wakaba. Together they take a step into the unknown, unsuspecting of the secrets hidden below the surface... (Source: Crunchyroll)

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