- Ear Worm:
- "Mankai Kaika Sengen", the game's opening. You'll find yourself humming to it when it plays.
- Some of the Summer Troupe songs are also very catchy such as "Oresama Natsu Summer" and "Rakuen Oasis".
- "Just for Myself" and "Buzama" from the Autumn Trope is also quite popular.
- Epileptic Trees: Not by much, but after the "Die By The Blade" event, theories that Kamizaka Reni is related to Guy, and is possibly his father, came about. Compared to his treatment of the other Mankai members, Kamizaka's treatment to Guy was much more kinder.
- Fanfic Fuel: The April Fools specials are rife with this and made potential to be an Alternate Universe of its own. One being the High school AU for 2017's April Fools that grow very popular in fan works.
- Fan-Preferred Couple:
- For Izumi ships, Sakyo and Izumi is one of the popular examples due to the two being Childhood Friends. Other popular options include Banri, Itaru, or Tsumugi. As of the release of Act 5 onwards, pairing Izumi with Chikage had become common.
- For Ho Yay ships, some of the most popular include Banri/Itaru, Banri/Juza, Tenma/Yuki, Tasuku/Tsumugi, and Hisoka/Homare.
YMMV / A3!