A Pure, Sincere Boy is Getting Addicted to Cuckold Sex ~Part 2~

The NTR angle is implied, but never actually shown, so we're
not subjected to the emotional anguish associated with NTR.

As you say, this series is a lot of fun, thanks mainly to Saitou,
a lusty, likeable, unapologetic slut who's willing to suck cock
anywhere. She's incredibly hot. Aoyama can barely keep his
hands off her.

The sequel might focus on the netorase angle. I wouldn't
mind seeing a chapter from the boyfriend's point of view,
as he shadows Saitou & surreptitiously jerks off in public,
while watching her fuck other guys in public. That would
really ramp up the exhibitionism factor.

Saitou and her boyfriend split up frequently during the
story, which is suspicious, as if he's deliberately giving
her the opportunity to indulge in some slutty fun. Also,
she sent him a text, specifically inviting him to look for
her on the Ferris wheel, so he must have seen Saitou
while she was very publicly fucking Sekine & Aoyama.
And he must surely be aware that she's not wearing
anything under her sundress. No bra. No panties.
No morals.

However, we never actually see Saitou's boyfriend jerking
off, or deriving any sort of perverse pleasure from her slutty
behavior, so the "netorase" tag might be a spoiler, based on
an NTR revelation in a future chapter.

Unless you enjoy the sight of a girl getting dizzy and
puking up cum & breakfast all over your dick & balls.
Yummy.