[Crossover] This Host Is Poisonous

At the glorious peak of the ninja world, kindle the flame of peace across the land.

A dating sim system for girls, 419. Don't think you've found your true love, only to discover he's a man. Tsk, if you're a man, why have long, straight black hair!

Well, fine. A man is a man. At least he's hailed as "the god of the ninja world" and "the pinnacle of an era," so he should know how to get things done.

But then...

[Your conquest target "Hibari Kyoya" has happily married "Rokudo Mukuro." You have been cuckolded. Please take note.]

[Your conquest target "Suo Mikoto" has happily married "Munakata Reisi." You have been cuckolded. Please take note.]

[Your conquest target "Gilgamesh" has happily married "Enkidu." You have been cuckolded. Please take note.]

[Your conquest target "Tony Stark" has happily married "Steve Rogers." You have been cuckolded. Please take note.]

[Your conquest target...]

[Your...]

[...]

"Host! I'm a dating sim system for girls, not a matchmaking system, aaah!"

"Ahaha, isn't this great?"

System: ... Heh. Host, since you love playing matchmaker so much, fine then (-ι_-+)

[To preserve peace in the ninja world and prevent the world from being nuked, a special mission has been issued. Bring the mission targets, "Uchiha Madara" and "Uchiha Obito," together.]

Senju Hashirama: ...

System: Host, I hear you love playing matchmaker |. ?ω?)っ What do you think of this mission?

Senju Hashirama: Wait! I've decided dating sim conquest games for girls are great!

Main pairing: Hashirama and Madara. No breaking them up or switching their roles. There are lots of side pairings...