Really any anime scenario blogs that you know of will work! SFW or NSFW, it doesn't matter =)
//ANIME SCENARIO BLOGS//
Shingeki no Kyojin
aot-imagine (SFW/NSFW)
aot-imagines (SFW/NSFW)
attack-on-imagines (SFW/NSFW)
imagine-shingeki (SFW/NSFW)
imagines-snk (SFW/NSFW)
shingeki-no-scenarios (SFW/NSFW)
shingekinoscenarios (SFW/NSFW)
Hetalia
aph-imagines (SFW/NSFW)
aph-imaginings (SFW/NSFW)
aphauimagines (SFW/NSFW)
aphimagines (SFW/NSFW)
hetalia-after-dark (NSFW)
hetalian-imaginations (SFW)
hetalian-imagine (SFW/NSFW)
hetalianimagines (SFW/NSFW)
imagine-hetacanon (SFW/NSFW)
imaginehetalians (SFW/NSFW)
imaginethehetalians (SFW/NSFW)
scenarios-of-a-hetalian-kind (SFW, formerly SFW/NSFW)
Tokyo Ghoul
asking-tokyo-ghoul (SFW/NSFW, mainly SFW)
asking-tokyoghoul (SFW/NSFW)
comfort-by-ghouls (SFW/NSFW)
ghouish-scenarios (SFW, and mild NSFW)
ghoul-scenarios (SFW)
ghoulimagines (SFW/NSFW)
imagine-ghouls (SFW/NSFW)
imagine-tokyoghoul (SFW/NSFW)
imaginetheghouls (SFW/NSFW)
imagining-ghouls (SFW/NSFW)
strictly-nsfw-tokyo-ghoul (NSFW)
tg-scenarios (SFW/NSFW, mainly SFW)
tgimagines (SFW/NSFW)
tokyo-ghoul-scenarios (SFW/NSFW)
tokyoghoul-scenarios-hcs-whatifs (SFW/NSFW)
tokyoghoulscenarios (SFW/NSFW)
toukyoukushuscenarios (SFW)
Diabolik Lovers
diabolik-drabbles (SFW/NSFW)
diaboysgifscenarios (SFW/NSFW)
imaginedialovers (SFW/NSFW)
imaginethedialovers (SFW/NSFW, mainly SFW)
r18dls (SFW/NSFW, mainly NSFW)
sakamakiscenarios (SFW/NSFW)
Kuroshitsuji
blackbutlerreaperscenarios (SFW/NSFW)
kuroshitsuji-imagines (SFW/NSFW)
kuroshitsuji-scenario (SFW/NSFW)
kuroshitsuji-scenarios (SFW/NSFW)
that-butler-imagining (SFW/NSFW)
young-masters-scenarios (SFW/NSFW)
Death Note
deathnote-imagines (SFW/NSFW)
deathnotedrabbles (SFW/NSFW)
deathnotepreferences (SFW/NSFW)
deathnotescenarios (SFW/NSFW)
strictly-nsfw-death-note (NSFW)
wammy-imagines (SFW/NSFW)
Free!
be-imaginative-be-free (SFW)
dirtylittleswimmerboys (SFW/NSFW)
dreaming-of-those-swimmers (SFW/NSFW)
eternalsummerscenarios (SFW/NSFW)
forthefuture-scenarios (SFW/NSFW)
free-meofthisharem (SFW/NSFW, mainly NSFW)
free-nsfw-imagines (NSFW)
free-scenarios (SFW/NSFW)
free-scenarios-club (SFW/NSFW)
freecutesyscenarios (SFW/NSFW)
freegifscenarioblog (SFW/NSFW)
freeiwatobiimaginesonly (SFW/NSFW)
freensfwscenarios (NSFW)
futurefish-imaginesreacts (SFW/NSFW)
imagine-eternal-swimmers (SFW/NSFW)
imagine-freestyle (SFW/NSFW)
imagine-iwatobi-and-samezuka (SFW/NSFW)
imagine-poolside-at-iwatobi (SFW/NSFW)
imagine-swimmerboys (SFW/NSFW)
imagine-swimmers (SFW/NSFW)
imagine-the-free-boys (SFW)
imagineiwatobi (So far only SFW, but I’m not 100% sure about the rules)
imagineiwazuka (SFW/NSFW)
imaginewiththefreeboys (SFW/NSFW)
iwatobi-drabbles (SFW)
iwatobi-imagines (SFW/NSFW)
iwatobi-scenarios (SFW/NSFW)
iwatobifluffclub (SFW/NSFW)
n-s-f-w-free (NSFW)
nsfw-swimmingclub (SFW/NSFW, mainly NSFW)
ohfreeimagines (SFW/NSFW)
only-write-free (SFW/NSFW)
samezuk-ass (SFW/NSFW)
splashfree-imagines (SFW/NSFW)
strictly-nsfw-free (NSFW)
swim-boys-scenarios (SFW)
swimboy-scenarios (SFW/NSFW)
swimfree-imagines (SFW/NSFW)
swimmerscenarios (SFW/NSFW)
swimmingscenarios (SFW/NSFW)
weeaboowriter (SFW/NSFW)
Durarara!!
drrrimmaginare (SFW/NSFW)
drrrscenarios (SFW/NSFW)
durarara-daydreams (SFW)
durararaimagines (SFW/NSFW)
durararascenarios (SFW)
imagine-drrr (SFW/NSFW)
imagine-durarara (SFW/NSFW)
Ouran Highschool Host Club
hostclub-imagines (SFW/NSFW)
imagine-ouran (SFW/NSFW)
ohshc-scenarios (SFW)
ouran-high-host-club-imagines (SFW/NSFW)
ouranhighschoolhostclvb (SFW/NSFW, mainly SFW)
ouranhostclubimagines (SFW and NSFW headcanons)
ouranhshc-imagines (SFW/NSFW)
ouranimagines (SFW/NSFW)
ouranimaginethis (SFW/NSFW)
Karneval
karneval-scenarios (SFW and mild NSFW)
Psycho Pass
psychopassimagines (SFW/NSFW)
Kuroko no Basuke
basketballbakas (SFW/NSFW)
basuke-bakas (SFW)
fyeahknbboys (SFW/NSFW)
imagine-knb (SFW/NSFW)
imagine-three-pointers (SFW/NSFW)
imagine-with-knb (SFW/NSFW)
imaginebasketballboys (SFW/NSFW)
imaginethisknb (SFW)
imagineknb (SFW/NSFW)
knb-dorks-imagine (SFW/NSFW)
knb-imagines (SFW/NSFW)
kuroko-no-nsfw (NSFW)
kurobasuscenario (SFW/NSFW)
Haikyuu!!
ahaikyuunsfwthing (NSFW)
all-haikyuu-imagines (SFW/NSFW)
dream-with-haikyuu (SFW)
dudejusthaikyuu (SFW/NSFW)
haikyuu-bubbles (SFW)
haikyuu-fics (SFW/NSFW)
haikyuu-hearts (SFW/NSFW)
haikyuu-imagination (SFW/NSFW)
haikyuu-imagines (SFW/NSFW)
haikyuu-scenarios (SFW/NSFW)
haikyuu-situations (SFW/NSFW)
haikyuusituationsblog (SFW/NSFW)
haikyuusmut (NSFW)
hq-imagination (SFW/NSFW)
hq-imagines (SFW/NSFW)
hq-scenarios (SFW/NSFW)
imagine-haikyuus (SFW/NSFW)
imagine-volleynerds (SFW/NSFW)
Soul Eater
soul-eater-scenarios (SFW)
Multiple
ackermanssassyass (SFW/NSFW)
anime-cupid (SFW/NSFW)
anime-imagines-and-other-stuff (SFW/NSFW)
ciels-wonderland (SFW)
eustasskidsfineass (SFW/NSFW)
knb-hq-scenarios (SFW/NSFW)
imagine-aphfreetitans (SFW/NSFW)
imagine-free-ball (SFW/NSFW)
imagine-sports-dorks (SFW/NSFW)
imaginethefreecrows (So far only SFW, but I’m not 100% sure about the rules)
imaginevarioussports (SFW/NSFW)
imaginewithanime (SFW/NSFW)
imagining-anime (SFW/NSFW)
in-sports-anime-hell (SFW)
meshing-the-anime-imagines (SFW/NSFW)
nsfwanimeimagines (NSFW)
scripturamortem (SFW/NSFW)
sexy-sports-baes (NSFW)
sports-anime-scenarios (SFW/NSFW)
sportsanime-scenarios (SFW and NSFW headcanons)
swim-free-ball-hard-imagines (SFW/NSFW)
venividiwindex (NSFW)
the post that started my imagineiwatobi career
and yes this is a sfw blog