"Uroboros no Wa" ("Uroboros Circle") story by Kanari Youzaburou art by Keiko Yamamoto 2 volumes-complete
Wakaba's school is being overran by a cursed letter which you must send out to two of your closest friends. I liked the beautiful, neat art. Although the story is short it managed to combine fun and sweet moments with disturbing and frightening scenes. The conclusion felt rushed though because you expect stories like this to go on a loop because the 'villain' won't just give up that easily. Thanks to Nor Liana Kamaruzzaman for recommending this.