sleep. The player can also try to solve classmates' problems during their free time. The cause for their problems sometimes reside outside the real world, in the Other World; by visiting it, the player can seek out emotion fragments, which cause defects in the real world. After finding the fragments and overcoming challenges in the Other World, the player learns about the thoughts of the character they're helping, is returned to the real world, and receives reward items and fragments. Different missions include different rewards; some give the player growth points, which the player can invest in their characters' attack, defense, support, or technic stats, making them stronger and teaching them new skills. The fragments the player acquires can be equipped to the characters' skills, giving the skills additional effects. In addition to the rewards, some missions give the player evaluation points; the story progresses when the player has acquired enough of them. While exploring the Other World, the player sometimes encounters monsters, leading to a battle, wherein the three characters in the player's party fight through a turn-based system. The turn order is displayed through character icons that move across a bar, with characters at the center of the bar allowed to perform an action; by preemptively attacking monsters in the Other World, the player's party can start the battle at an advantage. Actions are chosen through a menu, with commands such as "attack" and "support". If certain requirements are met, the player can perform cooperative moves, where the powers of the characters in their party are linked, resulting in a much more effective attack than regular attacks. During each turn, the player can choose to charge up their ether; they can consume this when recovering or guarding to improve those actions' effects. Unlike other commands, these two are done in real-time before the player characters or the enemies perform an action, by pressing a button at the right time. In the real world, the player sometimes encounters powerful enemies called "Pure Breeds", which are capable of defeating a party member in one blow. During these battles, the player can receive support from the player character's schoolmates, who all have different support abilities; to do this, the player needs to choose up to four support characters per party member while outside combat. The player's "guard" action also changes during these battles, to "reflect", through which the player can reflect