Tadayoedo Shizumazu, Saredo Naki Mo Sezu
Complete | Yoneda Kou | 2009 released
2017-09-01 15:39 marked
it's prequel (ch.0) to: Saezuru Tori wa Habatakanai
Ringo ni Hachimitsu
Complete | hide yoshiko,Hideyoshico | 2000 released
2017-11-19 23:29 marked
prequel and extras to: Kare No Barairo No Jinsei + different story (ch 3-5).... - reencounter, writer, 2012, end of world..
First Bite
Complete | Kakine | 2000 released
2018-04-27 20:37 marked
is a prequel of http://www.mangago.me/read-manga/renchin/
Goblin Slayer: Side Story Year One
Ongoing | KAGYUU Kumo,Kento Sakaeda | 2000 released
2018-11-18 20:01 marked
ch 20.5
Chou to Kumo no Su
Complete | Akabeko | 2000 released
2019-02-16 23:30 marked
Prequel to Chou to Hana no Kankeisei
Stigmata - Seikon Sousa
Complete | TAKAHASHI Hidebu | 2014 released
2019-09-12 00:42 marked
has a sequel: Stigmata - Aikon
Azami