RELATED SERIES TIMELINE
1)Lonely Playground (Adapted From)
https://www.mangago.me/read-manga/lonely_playground/
2 Volumes // 9 CHP + 2 EXTRAS(Complete)
2)Akunin no Shitsukekata (Spin-Off)
https://www.mangago.me/read-manga/akunin_no_shitsukekata/
1 Volume // 7 CHP (Complete)
RELATED SERIES TIMELINE
1)Lonely Playground (Adapted From)
https://www.mangago.me/read-manga/lonely_playground/
2 Volumes // 9 CHP + 2 EXTRAS(Complete)
2)Akunin no Shitsukekata (Spin-Off)
https://www.mangago.me/read-manga/akunin_no_shitsukekata/
1 Volume // 7 CHP (Complete)
14 Volumes (Ongoing) source :mangaupdates
https://renta.papy.co.jp/renta/sc/frm/item/206640/
CURRENTLY 15 VOLUMES
Notes: Just sharing info found on MangaUpdates & Japanese RENTA I'm also waiting for the uploader to update next volumes and chapters. Apologies in advance if any details are incorrect!
RELATED SERIES TIMELINE
1)Takane no Hana wa Chirasaretai (Prequel)
https://www.mangago.me/read-manga/takane_no_hana_wa_chirasaretai/
2 Volumes (Complete)
2)Takane no Hana wa Midasaretai (Sequel)
https://www.mangago.me/read-manga/takane_no_hana_wa_midasaretai/
4 Volumes (Complete)
RELATED SERIES TIMELINE
1)Takane no Hana wa Chirasaretai (Prequel)
https://www.mangago.me/read-manga/takane_no_hana_wa_chirasaretai/
2 Volumes (Complete)
2)Takane no Hana wa Midasaretai (Sequel)
https://www.mangago.me/read-manga/takane_no_hana_wa_midasaretai/
4 Volumes (Complete)
6 Volumes // 27 Chapters + 7 Extras + Special Edition + 3 Booklets (Ongoing)
V1: 5 Chapters + Extra + Special Edition (1~5.5)
V2: 5 Chapters + Extra (6~10.5)
V3: 5 Chapters + 2 Extras (11~15.6)
V4: 5 Chapters + 2 extras (16~20.6)
V5: 5 Chapters + Extra (21~25.5)
V6: 2 Chapters (ongoing) 26~
NOTES:
I'm just sharing the information I found on MangaUpdates. As for the next vol and where to read the rest..I'm also waiting for the uploader to continue updating. I might be wrong about some of the information..so I apologize in advance
RELATED SERIES TIMELINE
1)Kiraide Isasete (Adapted From)
7 Volumes // 42 Chapters + 14 Extras (Ongoing)
2)Kiraide Isasete - Asanaga-sensei to Yanagi-sensei (Spin-Off)
2 Volumes / 12 Chapters + 2 Extras (Complete)
V1: 6 Chapters + Extra (1-6.5)
V2: 6 Chapters + Extra (7-12.5)
3)Kiraide Isasete: Mane to Otoha (Spin-Off)NOT TRANSLATED YET
NOTE: But it's already translated on other sites.
Second spin-off featuring Otoha and his manager.
1 Volume // 6 Chapters + Extra (Completed)
RELATED SERIES TIMELINE
1)Kiraide Isasete (Adapted From)
7 Volumes // 42 Chapters + 14 Extras (Ongoing)
2)Kiraide Isasete - Asanaga-sensei to Yanagi-sensei (Spin-Off)
2 Volumes / 12 Chapters + 2 Extras (Complete)
V1: 6 Chapters + Extra (1-6.5)
V2: 6 Chapters + Extra (7-12.5)
3)Kiraide Isasete: Mane to Otoha (Spin-Off)NOT TRANSLATED YET
NOTE: But it's already translated on other sites.
Second spin-off featuring Otoha and his manager.
1 Volume // 6 Chapters + Extra (Completed)
RELATED SERIES TIMELINE
《Red Thread Series》
1)Akai Ito no Shikkou Yuuyo / The Red String of Fate (Adapted From)
https://www.mangago.me/read-manga/akai_ito_no_shikkou_yuuyo/
1 Volume (Complete)
2)Kanawanu Koi no Musubikata (Spin-Off)
https://www.mangago.me/read-manga/kanawanu_koi_no_musubikata/
1 Volume (Complete)
NOTEUploaders combined all three series UNDER the main titleKANAWANU KOI NO MUSUBIKATA
To clear up the chapter mapping
Vol 1: Kanawanu Koi no Musubikata (Chapters 1–7)
Vol 2: Tsunaida Koi no Kanaekata (Chapters 8–14.5)
Vol 3 & 4: Musunda Koi no Tsutaekata (Chapter 15 onwards) ONGOING
3)Tsunaida Koi no Kanaekata (Sequel)
https://www.mangago.me/read-manga/tsunaida_koi_no_kanaekata/
1 Volume (Complete)
4)Musunda Koi no Tsutaekata (Sequel)
2 Volumes (Ongoing)
RELATED SERIES TIMELINE
1)Boku no Tsugai wa Neko Shinshi (Adapted From)
4 Volumes (Complete)
2)Boku no Tsugai wa Neko Shinshi Gaiden (Spin-Off)NOT TRANSLATED YET
1 Volume (Complete)
NOTES:I'm just sharing the information I found on MangaUpdates. I'm also waiting for the uploader to update next volumes and chapters.. I might be wrong about some of the info..Apologies in advance if any details are incorrect!