1Levels
The game has this turned off for now, so it is never offered.
Lv1 10 PP
Spend time before the disaster to reinforce windows and doors.
Lv2 13 PP
Spend time before the disaster to reinforce windows and doors.
Lv3 15 PP
Spend time before the disaster to reinforce windows and doors.
Lv4 18 PP
Spend time before the disaster to reinforce windows and doors.
Lv5 20 PP
Spend time before the disaster to reinforce windows and doors.
2Who can learn it
Every character can learn it.