Tower of God (series)

Tower of God is a Manhwa series created by the Korean artist SIU. The story is centered around a boy named Baam who lives inside the massive, titular Tower and aims to find his childhood friend who wants to climb to the top. It is comprised of two seasons, Part I and Part II, the latter ongoing.

Part I Spoiler-Free Introduction
Twenty-Fifth Baam is a young 16 year old man who had never experienced society and the presence of others except Rachel - the only girl he ever cared about and for. He desired nothing more than to continue living with her, but when Rachel wants a taste of the mythical Tower, she embarks on her journey, Baam desperately following in her tracks. Join Baam as he makes his journey through the Tower on his brave mission to find his best friend, makes friends, faces challenges and overcomes the tragedies he faces!

Part II Spoiler-Free Introduction
Ja Wangnan is one of your average Twentieth Floor Regulars. Stuck, in debt, and failing miserably to live up to his tasks. However, when he embarks on his trials one final time, will he overcome the challenges that push him to his limits? Join Ja Wangnan as he scales the Twentieth Floor, making friends out of foes on the way, forcing himself to defeat enemies when faced with great tragedy, and ultimately proving to himself that he is more than his just his own aspiration...

Protagonists:

 * Twenty Fifth Baam and Jyu Viole Grace (Part I and II)
 * Koon Agero Agnis (Part I and II)
 * Androssi Zahard (Part I)
 * Rak Wrathraiser (Part I)
 * Ha Yuri Zahard (Part I and II)
 * Ja Wangnan (Part II)
 * Yeon Yihwa (Part II)

Antagonists:

 * Yu Han Sung (Part I)
 * Lo Po Bia Ren (Part I)
 * Koon Maschenny Zahard (Part II)
 * Kim Lurker (Part II)