Ningyo no Hanakago - Ch. 2 - Shirou and Tami. When The Door Opens: Part One

[MangaDex]

 

[popo53414]

So this isn't about fish seggs

 

[HoangDinh]

 

[HoangDinh]

So this isn't about fish seggs

you can look to mizone or any erotica manga for that
also I'm sure you've heard of Seto no Hanayome