Veritably Abbey (chapter) is the 27th overall chapter of Tegami Bachi Manga
Lag and Zazie are seen arriving in Lament, to which, Connor tells them that he has fallen in love with a girl from the Abbey who sold cookies to him for one time, who, unbeknownst to them, is actually Roda. Connor buys cookies from a red-headed girl after that, whose name was Sunny. She tells them that the white-haired girl only came to the Abbey once. After seeing Roda nearby, Lag comes to the conclusion that the Abbey is a base for Reverse.
Soon, he tells Connor to head back to the Bee Hive and alert Largo Lloyd about this place, while he disguises as a girl to gain access to the Abbey. Since the Abbey is for women at this specific one, men are not allowed on the premises. After Sunny invites Lag in for shelter, she heads for her prayers. Lag calls himself "Lara."
Lag follows and discovers that the nuns are led by Roda, who acts as the Abbess, to believe that by sacrificing themselves, they will help revolutionize the government and save their fellow humans.
Soon, Sunny is stopped by another sister, who tells her to place poison in the cookies batch for Connor. Meanwhile, everyone is heading to Angel Wings. Lag goes off to explore but is caught by Roda, who recognizes him by his white hair and spirit amber eye, which leads to a short fight. Roda tells Lag that they will exact ultimate revenge on the government, using the molten gaichuu (probably Cabernet) as a weapon.