Tagai no Guardian

Two young women train to become Bastioners, warriors who use the power of Aegis to defend against extraterrestrial invaders. Aegis can enhance strength but must be administered by another person, requiring combatants to fight in pairs. Yorino Aratsugu and Yoko Kaminoi are close friends and trainees. Yorino once protected the shy Yoko from bullies, but Yoko has now outperformed Yorino in most areas except combat. As they prepare for full status as Bastioners, Yorino faces the challenge of keeping up with Yoko’s abilities while also coming to terms with her complex emotions toward her.