Kizumonogatari is an anime series that aired in 2016.
Three episodes were produced and shown on television without any reported filler material in between them! Koyomi Araragisecond-year high school student at Naoetsu High School, usually anti-social, befriends Tsubasa Hanekawa.
The two are friends for most of the series until they find out she’s actually been seeing “The Blonde Vampire,” which brings them into an intense relationship with each other. Others like themselves in their town and are hunted down by various individuals seeking to kill this type of legend called monster or vampire.
This prequel story centers around Koyomimonoga. Our protagonist forms his close relationship with him and tsuma when he meets her during summer vacation before anything happens involving vampires. However, there still may exist some sort love triangle situation going here too.