Rikei ga Koi ni Ochita no de Shoumei shitemita - Vol. 13 Ch. 70 - Science Fell In Love And Started Thinking About Sex

[MangaDex]

 

[serialsly]

On page 8 you can see how "Sister with strength" was born

 

[Darkyan97]

That's like the 3rd time this week I encounter Dragon Car Sex in manga/anime...