13 Chapters + 1 Extra (Complete)

S1: 7 Chapters + Extra
S2: 6 Chapters

Note:All official sites have multiple misleading "title pages" that might make you believe that there are 11 chapters each season (and one chaper in the wrong place) because after the extra chapter they have the titles: S2 Ch1-3, S1 Ch11 and S2 Ch10-11. But in fact its chapters 1-3, 4 and 5-6 of season 2. Below is a list of how each site names and divides the chapters.

Bilibili:
Ch 1-7 = S1 Ch1-7
Ch8 = Extra Parts 1-3
Ch9 = S2 Ch1 Parts 1-4
Ch10 Parts 1-6 = S2 Ch2 Parts 1-6
Ch11 Parts 1-6 = S2 Ch3 Parts 1-6 (p.2-6 have typo in number on titular page)
Ch12 Parts 1-6 = S1 Ch11 Parts 1-6
Ch13 Parts 1-6 = S2 Ch10 Parts 1-6
Ch14 Parts 1-5 = S2 Ch11 Parts 1-5
(38 "Chapters" in total)

Kuaikan/U17:
Ch1-2 = S1 Ch1-2
Ch3-8 unavailable
Ch9 = S2 Ch1 Parts 1-4
Ch10 = S2 Ch2 Parts 1-6
Ch11 = S2 Ch3 Parts 1-6
Ch12 = S1 Ch11 Parts 1-6
Ch13 Parts 1-6 = S2 Ch10 Parts 1-6
Ch14 Parts 1-5 = S2 Ch11 Parts 1-5
(17 "Chapters" in total)

Mkzhan:
Ch1-4 = S2 Ch1 Parts 1-4
Ch2-10 = S2 Ch2 Parts 1-6
Ch11-16 = S2 Ch3 Parts 1-6 (p.2-6 have typo in number on titular page)
Ch17-22 = S1 Ch11 Parts 1-6
Ch23-28 = S2 Ch10 Parts 1-6
Ch29-33 = S2 Ch11 Parts 1-5
(33 "Chapters" in total)

Mangatoon:
Ch1-4 = S1 Ch1-4
Ch5-9 = S1 Ch5 (5 parts)
Ch10-15 = S1 Ch6 (6 parts)
Ch16-22 = S1 Ch7 (7 parts)
Ch23-25 = Extra Parts 1-3
Ch26-29 = S2 Ch1 Parts 1-4
Ch30-35 = S2 Ch2 Parts 1-6
Ch36-41 = S2 Ch3 Parts 1-6
Ch42-47 = S1 Ch11 Parts 1-6
Ch48-53 = S2 Ch10 Parts 1-6
Ch54-58 = S2 Ch11 Parts 1-5

U17:
Titled as 13 Chapters in 68 parts. No other info because its removed from site.