Okay , for the record , IFR soaring Konosora spoiler # s which they actually did do it in the end of Kotori ' s route . Not sure about the others because I quit after enduring the shittier translation for one playthrough . is a terrible idea in general , because most of gliders are not equipped with gyroscopic instruments attitude indicator , turn coordinator , etc . . Without gyro instrument , it means once visual reference to the horizon is lost , the pilot would suffer spacial disorientation , for there is literally no way to orient oneself the right way . One of several things could happen 1 . inadvertently enter into a dive and crash . 2 . inadvertently stall the plane , dive and clash . 3 . inadvertently flies into a mountain . Konosora spoiler # s Seeing that at the end of the route , they were trying to takeoff with basically zero visibility , no actual IFR instrument , and trying to literally flying near a cloud formation . I ' d say they don ' t give a shit about aviation safety , and has been surviving on pure luck and plot armour . In fact , the whole VN was a lesson on ' what not to do when soaring '.