Off You Go, Damn Angel! is the 9th chapter of the High School DxD manga, serialized in Monthly Dragon Age on August 9th, 2011 and published in tankōbon format in Volume 2 on December 6th, 2011.
Summary[]
Issei Hyoudou is batting Raynare who initially has the upper hand until Issei's newfound will to avenge Asia activates his Sacred Gear "Boosted Gear". He activates Boost and attempts to punch her but she easily evades the attack and trips him over. Issei activates Boost again and attempts to punch Raynare but she jumps back and impales him in the leg with a light spear. When he removes the spear, the light from it poisons him and immobilizes him as Raynare prepares her final attack to finish him. In desperation, Issei prays to Satan and Boosts one more time before using Explosion to release all his power. Using his newfound power and regained motion, he evades Raynare's second light spear and punches her at high speed, sending her through the wall and knocking her out cold. After the battle, the devils appear congratulating Issei on his victory, despite Asia's death. Rias Gremory appears with Akeno Himejima and congratulates Issei as Akeno wakes Raynare using her water magic. Raynare threatens them with an attack from Fallen Angel reinforcements when Akeno & Rais reveal that local Fallen Angels Kalawarner, Dohnaseek and Mittelt were interrogated by Akeno and then 'erased' by Rias. Rias then explains to Raynare that Issei's Sacred Gear is the "Boosted Gear", one of the thirteen Longinus that has the spirit of the Red Dragon Emperor sealed within it. Raynare then pretends to change back to Yuuma while desperately trying to beg Issei to spare her, which Issei responds to by abandoning her to Rias who erases her.