ʙɪᴡᴀ ʜᴀʏᴀʜɪᴅᴇ (@massivebighead) header
ʙɪᴡᴀ ʜᴀʏᴀʜɪᴅᴇ (@massivebighead) profile picture

ʙɪᴡᴀ ʜᴀʏᴀʜɪᴅᴇ

@massivebighead

Big Face NSFW / MDNI / Mod 18+ / DMs OPEN / Not associated with Cygames No art is mine

 Stallions dorms
Joined October 2026
  • Tweets82
  • Following80
  • Followers65
9Media
Photo by ʙɪᴡᴀ ʜᴀʏᴀʜɪᴅᴇ (@massivebighead)Photo by ʙɪᴡᴀ ʜᴀʏᴀʜɪᴅᴇ (@massivebighead)Photo by ʙɪᴡᴀ ʜᴀʏᴀʜɪᴅᴇ (@massivebighead)Photo by ʙɪᴡᴀ ʜᴀʏᴀʜɪᴅᴇ (@massivebighead)Photo by ʙɪᴡᴀ ʜᴀʏᴀʜɪᴅᴇ (@massivebighead)Photo by ʙɪᴡᴀ ʜᴀʏᴀʜɪᴅᴇ (@massivebighead)Photo by ʙɪᴡᴀ ʜᴀʏᴀʜɪᴅᴇ (@massivebighead)Photo by ʙɪᴡᴀ ʜᴀʏᴀʜɪᴅᴇ (@massivebighead)Photo by ʙɪᴡᴀ ʜᴀʏᴀʜɪᴅᴇ (@massivebighead)
ᴛʜɪꜱ... ɪꜱ ʜᴏᴡ ʏᴏᴜ ᴅᴇʀɪᴠᴇ ᴠɪᴄᴛᴏʀʏ!
Image from ʙɪᴡᴀ ʜᴀʏᴀʜɪᴅᴇ (@massivebighead)
1
14
35
691
Blinked in pleasant surprise, savoring the unexpected sweetness of the elixir. Her initial skepticism softened as she considered its surprisingly agreeable flavor. "I must admit, it's rather delicious! Though, a pleasant taste doesn't necessarily guarantee its effectiveness. +
Agnes Tachyon (@madumascience) profile pictureAgnes Tachyon@madumascience1h
A smooth and surprisingly delicious pallet of flavors would greet Biwa "Well..~ What do you think? Surely its not that, I've learned my Mixology from Cafe- She does have her uses." Agnes was rather proud, despite Biwa's concerns, Agnes wasn't a monster- just a lustful uma.
Image from Agnes Tachyon (@madumascience)
1
1
25
We should still monitor its effects carefully."
13
Glancing at the collar, her ears twitching with curiosity. A faint blush appeared on her cheeks as she decided to entertain the nun's playful proposition. "Oh? So you're planning to tame a demon? I suppose I could play along. Though, are you certain you can handle one?"
sirius symboli (@WolfOfTheTrack) profile picturesirius symboli@WolfOfTheTrack1h
“What a beautiful look puppy.. but i think its time for this umm nun… to take a demon hmm.” She chuckled and twirled a collar on her finger looking at biwa
Image from sirius symboli (@WolfOfTheTrack)
1
2
35
Cautiously accepted the test tube, examining its contents one last time before raising it toward Tachyon. With a small sigh, she drank the elixir. "Very well... Cheers, Tachyon. And Happy Halloween to you too."
Agnes Tachyon (@madumascience) profile pictureAgnes Tachyon@madumascience1h
"I knew I could trust you~ Well then, shall we begin our collaboration together..?" Pulling another test tube from her pocket Agnes split the elixir between the two offering one to Biwa like a drink "Cheers..~ And Happy Halloween...~"
Image from Agnes Tachyon (@madumascience)
1
1
36
Hesitated as Tachyon approached, her ears twitching nervously. After a moment of consideration, she let out a resigned sigh. "Very well, Tachyon. I'll participate in your experiment. Though I expect you to monitor the results carefully!"
Agnes Tachyon (@madumascience) profile pictureAgnes Tachyon@madumascience2h
An excited nod would come from Tachyon "Precisely My Dearest Biwa~ If it makes you feel better I'll have some as well, I wouldn't dare put you through something I wouldn't myself..~" The Scientist drew closer with a rather commanding presence.
Image from Agnes Tachyon (@madumascience)
1
36
Arms folded, ears twitching at Tachyon's enthusiastic explanation. While she appreciated the compliment, the mention of live trials only made her more suspicious. "Simulations and actual trials are entirely different matters! And judging by your wording, I suspect you're-
Agnes Tachyon (@madumascience) profile pictureAgnes Tachyon@madumascience2h
A smug expression and cackle escaped the Scientist lips "Why of course..~ What Scientist wouldn't- it passed all my simulations and test trials, now we just need to endorse live trials, it worked wonders for my training routine honestly..~ Biwa you have such healthy skepticism~"
1
16
-hoping to make me one of your test subjects, aren't you?"
1
36
Listening to Tachyon's explanation, her expression growing increasingly skeptical. The combination of relaxants and stimulants sounded rather questionable, especially coming from someone notorious for her experiments. "Hmm... Relaxants and stimulants together? Tachyon, +
Agnes Tachyon (@madumascience) profile pictureAgnes Tachyon@madumascience10h
Agnes raised a brow "Oh...Well- Same rules apply -hm...But to answer your question my beautiful Biwa Hayahide~* Natural herbs, relaxants, a couple stimulants to promote muscle development and awareness, perfect for halloween parties or razing hell on a track of course~"
1
1
37
that hardly sounds like a sensible combination! Have you even conducted proper safety tests on this elixir of yours?"
1
1
56
Pretty please.
𝘚𝘈𝘒𝘜𝘙𝘈 𝘉𝘈𝘒𝘜𝘚𝘏𝘐𝘕 𝘖 (@BAKUSHIIIIIN) profile picture𝘚𝘈𝘒𝘜𝘙𝘈 𝘉𝘈𝘒𝘜𝘚𝘏𝘐𝘕 𝘖@BAKUSHIIIIIN17h
Ask veryyyyyy nicely....
1
40
"Hmm... Everything appears to be in order. My costume fits perfectly. Now then, I believe it's time to enjoy the Halloween festivities!"
Image from ʙɪᴡᴀ ʜᴀʏᴀʜɪᴅᴇ (@massivebighead)
1
3
2
23
196
Artist: teapaw.org/nagisa63/status/189883…
ナギサ🍈委託中 (@nagisa63) profile pictureナギサ🍈委託中
@nagisa639 Mar 2025
#ビワハヤヒデ生誕祭2025 姉貴誕生日おめでとう そして、お題箱にリクエストいただいた方大変お待たせしました
Image from ナギサ🍈委託中 (@nagisa63)
49
Munch munch munch. Finishing the cookies, Biwa asked if she can have more
𝘚𝘈𝘒𝘜𝘙𝘈 𝘉𝘈𝘒𝘜𝘚𝘏𝘐𝘕 𝘖 (@BAKUSHIIIIIN) profile picture𝘚𝘈𝘒𝘜𝘙𝘈 𝘉𝘈𝘒𝘜𝘚𝘏𝘐𝘕 𝘖@BAKUSHIIIIIN18h
There, there, happy, fed mare... That's the best a mare can be!!!
1
80
Big bite of the stacked cookies. Nodding her head that she enjoys it before taking another bite
𝘚𝘈𝘒𝘜𝘙𝘈 𝘉𝘈𝘒𝘜𝘚𝘏𝘐𝘕 𝘖 (@BAKUSHIIIIIN) profile picture𝘚𝘈𝘒𝘜𝘙𝘈 𝘉𝘈𝘒𝘜𝘚𝘏𝘐𝘕 𝘖@BAKUSHIIIIIN19h
Stacking two cookies...feeding her riiiight on up!!!
1
93
Oh? Tilting her head. How odd. Why not give it to her hands?... . . . Opens mouth. Aaaahh
𝘚𝘈𝘒𝘜𝘙𝘈 𝘉𝘈𝘒𝘜𝘚𝘏𝘐𝘕 𝘖 (@BAKUSHIIIIIN) profile picture𝘚𝘈𝘒𝘜𝘙𝘈 𝘉𝘈𝘒𝘜𝘚𝘏𝘐𝘕 𝘖@BAKUSHIIIIIN19h
Opppen thaaat mooouth!!
1
85
The big Uma appears. Greeting Bakushin first, then asked for a cookie. Two cookies.
𝘚𝘈𝘒𝘜𝘙𝘈 𝘉𝘈𝘒𝘜𝘚𝘏𝘐𝘕 𝘖 (@BAKUSHIIIIIN) profile picture𝘚𝘈𝘒𝘜𝘙𝘈 𝘉𝘈𝘒𝘜𝘚𝘏𝘐𝘕 𝘖@BAKUSHIIIIIN21h
BAKUSHIN HAS MADE COOKIES!!! IF ANYONE WANTS A TREAT!! PLEASE ASK!!
1
81
"Good morning, everyone! And a very Happy Halloween to you all! I hope you enjoy today's festivities, and remember to celebrate responsibly. May you all have a wonderful and enjoyable Halloween!"
7
60
Biwa will always be the best big sister for Brian. Making a proper meal for her. Eat your fruit and veggies! Offering guidance and support before her race. Draining her sack- Anything for her sister!
Image from ʙɪᴡᴀ ʜᴀʏᴀʜɪᴅᴇ (@massivebighead)
1
3
1
29
365
Halloween is near... And the Uma hasn't selected a costume!
1
1
1
5
257
ㅤ Anyone who dares put their hands @massivebighead 's or hurt her will be dealt by her . Do not hurt her sister , ever .
1
1
3
153
Load more