May I Give Thanks for These Wonderful Boobs! (この素晴らしい巨乳に感謝を！, Kono Subarashii Kyonyū ni Kansha wo!) is the forty-ninth chapter of the KonoSuba manga series, and covers Chapter 4 in Volume 5 of the light novels.
As alarms about the Demon King's Army attacking sound all over the village, Yuiyui hurriedly lets Megumin and Kazuma out, advising him to find somewhere safe even though the other villagers already have the attack on the village centre brought under control. Expecting a monster or two to escape their way, Kazuma proceeds to flee the village by himself during the confusion, only to run into a retreating Sylvia.
Pretending again to be Mitsurugi, Kazuma tries to scare the injured Demon King's General off with bluffs but to no avail, so he cuts at her with a sneak attack only to be easily blocked. Megumin who had used the toilet then shows up to spill the beans on him not being Mitsurugi, so once Aqua and Darkness also arrive, Kazuma gets grabbed by Sylvia into her chest as a hostage. This doesn't stop Aqua from hitting her with Sacred Exorcism that only harms Devils, though being a Growth Chimera Sylvia is only partially affected.
Sylvia proceeds to Bind Kazuma onto her so that she can take him as she flees, while Kazuma finds himself quite happy resting his head between Sylvia's breasts. He then blackmails his companions into apologising to him for their regular troublemaking with the threat of defecting, before proposing all kinds of lewd requests to Darkness for earning his forgiveness. Yet Kazuma is abruptly shocked when Sylvia, who starts becoming fond of him, lets slip that she is actually a hermaphrodite.
