manga
Summary:
Mayama Haruki and Himemiya Tsukiko have been childhood friends and neighbors for as long as they can remember, but after a girls-only meeting in fourth grade, Himemiya distanced herself from Mayama. Now in their 2nd year of middle school, Mayama has become an ero-freak who specializes in harassing Himemiya.Determined to unravel the greatest secret of girls, what happens on "that day", Mayama follows Himemiya and uncovers...!("that day" for girls may not be what you think it is)-from mangaupdates-
Chapters (41)
Aug 25, 2019
Chapter 41
Aug 25, 2019
Chapter 40 : Secret Base
Aug 25, 2019
Chapter 39 : The Great Escape
Aug 25, 2019
Chapter 38 : Remember!
Aug 25, 2019
Chapter 37 : The Truth Behind The Metamorphosis
Aug 25, 2019
Chapter 36 : Observing The Observation Diary
Aug 25, 2019
Chapter 35 : Read Online
Aug 25, 2019
Chapter 34 : The Princess, Captured...!?
Aug 25, 2019
Chapter 33 : Uneasy Days
Aug 25, 2019
Chapter 32 : Read Online
Aug 25, 2019
Chapter 31 : Fuck You!!
Aug 25, 2019
Chapter 30 : Bye Bye Xxx
Aug 25, 2019
Chapter 29 : First Confession
Aug 25, 2019
Chapter 28 : From Pure White To Purity!
Aug 25, 2019
Chapter 27 : The Second Album
Aug 25, 2019
Chapter 26 : Charm Maiden
Aug 25, 2019
Chapter 25 : If The Tears Poured
Aug 25, 2019
Chapter 24 : Run Young Man!!
Aug 25, 2019
Chapter 23 : The Confession
Aug 25, 2019
Chapter 22 : Coward
Aug 25, 2019
Chapter 21 : The Passing Days
Aug 25, 2019
Chapter 20 : Nonoa's Gloomy Day
Aug 25, 2019
Chapter 19 : History's Biggest Battle Plan
Aug 25, 2019
Chapter 18 : It's Show Time!!
Aug 25, 2019
Chapter 17 : Ptm: Peeping Teacher Minowa
Aug 25, 2019
Chapter 16 : Another Observation...
Aug 25, 2019
Chapter 15 : Thin Ice
Aug 25, 2019
Chapter 14 : Coming Out!
Aug 25, 2019
Chapter 13 : Howling Boy!
Aug 25, 2019
Chapter 12 : Looking For The Culprit
Aug 25, 2019
Chapter 11 : A Play Back Of That Day
Aug 25, 2019
Chapter 10 : Secret X Secret
Aug 25, 2019
Chapter 9 : Iron Protrusions!
Aug 25, 2019
Chapter 8 : That Girl's Observation
Aug 25, 2019
Chapter 7 : I'm Nonoa
Aug 25, 2019
Chapter 6 : A Close Call
Aug 25, 2019
Chapter 5 : That... Has Come Out
Aug 25, 2019
Chapter 4 : Iron Will
Aug 25, 2019
Chapter 3 : Not Eating What Is Set Before You
Aug 25, 2019
Chapter 2 : Tsukiko's Secret
Aug 25, 2019
Chapter 1 : 'that Day' Of Hers