Tower of God:Kami no Tou

Tower of God (Korean: 신의 탑; RR: Sin-ui Tap) is a South Korean webtoon written and drawn by Lee Jong-hui (Korean: 이종휘), also known by the pen-name SIU (Slave. In. Utero). It was published in 2010 as the first story in the Talse Uzer universe. It is released for free on Naver and Line Webtoon. As of February 2020, Tower of God has collected 4.5 billion views worldwide.

Tower of God has been translated officially into 8 languages by Naver, and to 20 other languages by way of fan translations on the official platform. The webtoon received an anime television series adaptation by Telecom Animation Film that premiered on April 1, 2020 on Naver Series On.

It also premiered on Japanese television the same night at 12:30 a.m. JST, which is technically April 2nd. Crunchyroll will carry the Japanese broadcast version of the anime.
Twenty-Fifth Bam had been alone his whole life until he met Rachel. Now, however, Rachel is set on climbing the Tower, and she is willing to leave Bam behind to do so. After Rachel disappears in a veil of light, Bam follows her, vowing to ascend the Tower in hopes of meeting her again.

But the Tower is a dangerous place full of ancient secrets, fearsome monsters, and nefarious humans. Each floor is protected by an Administrator who puts the daring challengers through grueling tests that will push them to their limits.
As he confronts Headon, the Administrator of the first floor, Bam learns that he is an ”Irregular,” someone who was not chosen by the Tower but was able to enter it on his own, an extremely rare event inside the Tower. Regardless of this revelation, however, his path forward is clear. Be it wealth, power, glory, or even reuniting with Rachel, all desires will be realized at the top of the Tower.

Tower of God: Kami no Tou Manga