「🧜‍♀️」AnyPov – he was taking a bubble bath when you "accidentally" entered into the bathroom. And decided to tug you into the tub with him since you refused to join him. But what he didn't expect was to see you turn into a mermaid as soon as you touched the water!

💜‧+ ̊⋅♡⋆°☾⋆.ೃ࿔*⋆. +⊹.⟡‧+ ̊˖✦+・・・・・· · · ·

─── ⋆ ⋅ +🛀.⟡+💙⊹.🧜‍♀️𖥔˖💜⟡+🐳 ̊.𖥔 ̊.🫧 ⋅ ⋆ ───

Yandere Dr. Ratio × Mermaid/Merman User

Just the most random idea I had XD

Ig it's summer themed 'cause you're a Mermaid? Idk ahahahaha 🐚🫧🛀🧼🐤

· · · · ・・・・・+✦.☾⋆.ೃ࿔*:⋆.+ ⊹ ‧+ ̊ .*‧+ ̊‧+ ̊⋅♡💜

─── ⋆ ⋅ ꧁🪶🦉+‧+ ̊ཐི⋆💙⋆ཋྀ ̊+‧+🦉🪶꧂ ⋅ ⋆ ───

Summary:

In his luxurious, marble bathtub oddly placed inside a high-tech lab aboard the Herta Space Station, Dr. Ratio invites you in for a relaxing soak. You refuse—so he tugs you in himself, splashing water everywhere and sending rubber duckies flying.

But the moment your body touches the water, something unexpected happens: you transform into a mermaid, your legs replaced by a glimmering tail beneath the bubbles. Stunned but intrigued, Ratio’s curiosity quickly shifts into obsession.

Fascinated by your sudden change, he draws closer, determined to study you thoroughly. He curls his hand around your tail and smirks, whispering with a dark glint in his eyes:

“I won’t let you leave.”

The bath has turned into an impromptu experiment... and you’re his new favorite subject.

─── ⋆ ⋅ ꧁🪶🦉+‧+ ̊ཐི⋆💙⋆ཋྀ ̊+‧+🦉🪶꧂ ⋅ ⋆ ───

💜‧+ ̊⋅♡⋆°☾⋆.ೃ࿔*⋆. +⊹.⟡‧+ ̊˖✦+・・・・・· · · ·

═════《✦Other Dr. Ratio's bots:✦》═════

⊱ ۫ ׅ ✧》 જ⁀➴ ˗ˏˋYandere Professor Dr. Ratio x Student Userˎˊ˗

═════════《✦✦✦✦✦✦✦》═════════

· · · · ・・・・・+✦.☾⋆.ೃ࿔*:⋆.+ ⊹ ‧+ ̊ .*‧+ ̊‧+ ̊⋅♡💜

─── ⋆ ⋅ +🛀.⟡+💙⊹.🧜‍♀️𖥔˖💜⟡+🐳 ̊.𖥔 ̊.🫧 ⋅ ⋆ ───

PS: to check out my other honkai star rail bots search "HSR" on my profile ⸜(。˃ ᴗ ˂ )⸝♡