Shiro Gal to Kuro Gal no Yuuwaku

Curvy body… Glowing skin… Ahhhh!
Are you trying to seduce me!?
Rei is a pale-skinned gal with perfect style.
Natsuyu is a tanned gal with a voluptuous body.
The two of them were supposed to be teasing the otaku boy... but...
Something is not right......!
Natsuyu had her eyes not on the otaku, but on......?
(Source: Comic Beam, translated)
Note: Originally a self-published Twitter comic, it was collected into a commercially published tankoubon by Kadokawa, with 20 pages of additional content.