Season 1
Anime series produced by Gonzo. It is part of media franchise The Art of 18, which also includes a smartphone game by Mobcast title "18: Kimi to Tsunagaru Puzzle" for Android and IOS.
Episodes
1 The Witch of Thunder Jul 7, 2017 
2 Time Stopped at Age 12 Jul 14, 2017 
3 The Witch of First Love Jul 21, 2017 
4 The Witch of Gluttony Jul 28, 2017 
5 The Witch of Ordinariness Aug 4, 2017 
6 Curses Return Upon the Casters Aug 11, 2017 
7 And Now There Are None... Aug 18, 2017 
8 Threshold Aug 25, 2017 
9 Idols Don't Go to the Bathroom! Sep 1, 2017 
10 Dream Dimension Alpha Sep 8, 2017 
11 The Thorn Cross Association Sep 15, 2017 
12 The Witch Wars Sep 22, 2017 
13 Eve's Sigh Sep 29, 2017