The strongest intervert became a girl by his sister

This is the story about a guy that secretly is the strongest human in the planet even his own sister don't know. So his sister turn him in to a girl that look like still in middle school, because she though her brother just a closet weeb who only watch anime in his room and have no friend

Also this world there hero, villain, and monster
-Hero ranks
F
E
D
B
A
S-
S
S+
SS-
SS
SS+
SS-
SS
SS+
SSS-
SSS
SSS+
Special
The special rank is only one person and he or you could say she is the main character

-Monster ranks
House disaster
Village disaster
City disaster
Kingdom disaster
humanity disaster
Planetary disaster

-Villain ranks
Robber
Mafia
Organization
SS
SSS
SSS+
disclaimer ⚠️⚠️⚠️
-There is will no yuri
-maybe a lemon 🍋