The Door into Puberty

"The Door into Puberty" (思春期のトビラ) is the sixty-seventh chapter of the Seraph of the End: Vampire Reign manga series, written by Takaya Kagami and illustrated by Yamato Yamamoto.

Synopsis
Shinoa resists Shikama Dōji opening "the door" and silences him before aiding her squad against the Horsemen.

Meanwhile, Yu and Kimizuki are able to inject the drug into the Sixth Trumpet and stabilize it.

Characters
List of characters in order of appearance:
 * Shinoa Hīragi
 * Shikama Dōji
 * Yūichirō Hyakuya
 * Makoto Narumi
 * Yoichi Saotome
 * Mitsuba Sangū
 * Mikaela Hyakuya
 * Shihō Kimizuki
 * Guren Ichinose
 * Sixth Trumpet
 * Mirai Kimizuki (Flashback)

Summary
Shinoa shuts the door to her emotions. Shikama Dōji says Shinoa will be unable to control her desires, and she will be overcome by lust and become obsessed with Yūichirō. Shinoa restrains him and tells him to shut up.

Returning her attention to the battlefield, she asks if the only reason Yu needs to live is the desire to save his family. She says this is fascinating. Shikama Dōji watches over her. She wants Yu to teach her more about reasons to live.

Mika and the humans charge and attack the Horsemen.

The sixth trumpet keeps telling Yu to die, but Yu says they don't need to fight. He says they are both part of the same experiment. Yu eventually jumps on top of the angel and holds him down. When he tries to attack Yu with the trumpet, Mika deflects it. Then, Kimizuki appears with the injection and stabs it into the angel's neck.

The sixth trumpet floats into the air, and a cross-shaped object with a ring on the top three points shoots out of his chest. The sixth trumpet falls, and his wings dissolve. Yu and Kimizuki catch him.

Then, there is a reaction from the Horsemen.

Gallery
Manga panels provide a visual overview of the events of chapter 67 with depictions of the characters, Seraph of the End world and scenarios.