The Twentieth Floor is an important point in the Tower. From this Floor onwards, Regulars are given the right to reside within the Middle Area while taking or retaking their tests. On the earlier Floors, they likely sleep in dormitories within the Inner Tower.
If they give up while climbing the Tower, they have the right to continue residing in the Middle Area either by themselves or with their families.
As this is also the floor where Regulars are chosen again, there is a massive increase in difficulty on this floor. Many Regulars go bankrupt paying testing fees needed to retake the test multiple times. Some regulars get themselves in trouble with loan sharks by borrowing money to retake the test after their failures.
Due to the high difficulty in the tests and small number of regulars whom pass the 20th Floor is also known as "The needle hole to heaven", and regulars who pass get recognition and obtain E-Rank regular status.
Characters of Note:EditGreat Family that the floor belongs to: Unknown (family symbol known, look right --> )
Test Administrators: Love