Every season of Who Is the Sender? ever, ranked from best to worst by thousands of votes from fans of the show. The best seasons of Who Is the Sender?!

Episode 1

Episode 2

Episode 3

Episode 4

Episode 5

Episode 6

Episode 7

Episode 8

Episode 9

Episode 10

Episode 11

Episode 12

Episode 13

Episode 14

Episode 15

Episode 16

Episode 17

Episode 18

Episode 19

Episode 20

Episode 21

Episode 22

Episode 23

Episode 24

Episode 25

Episode 26

Episode 27

Episode 28

Episode 29

Episode 30

Episode 31

Episode 32

Episode 33

Episode 34

Episode 35

Episode 36

Episode 37

Episode 38

Episode 39

Episode 40

Kuwazuru Mitsuki is a second year student at Arakawa Nishi High School. One day, her homeroom teacher, Tachibana, suddenly announces the start of the "Letter Game", where every student has to write a letter with his/her true feelings to each of the classmates. However, the "letter" will not include the sender's name. At first, there were a lot of bad jokes and silly "letters", but they slowly accelerate to revealing secrets and confessions, which make everyone question, "Who is the sender?" and "Who will be named next?" This game allows the students to become more aware of each other's hidden worries and thoughts, which slowly deepens the bond among the classmates. Meanwhile, Mitsuki tries to search for the sender of the letter sent to her and she discovers a secret hidden in this "letter game".

The Best Seasons of Who Is the Sender?

The Best Seasons of Who Is the Sender?

The Best Seasons of Who Is the Sender?

Season 1