Abyss No. 17

I dive into the abyss to save you, But unexpectedly, what you were waiting for was never rescue. But take over as the gatekeeper. Reading reminder: The tone of the whole book is depressing and depressing, with a standard BE ending, where we see each other again and say goodbye forever. The male protagonist continues to lose his memory, has no cool points, and no sweet pets. There are many supporting characters, and some characters are offline. If you don't like sadistic stories, please be careful with the tragic ending.