I never saw a reason to ship IshiTsuba outside of for Ishigami's happiness, but he will find an even greater happiness with Iino so it's all good. I'd have even taken him ending up with Osaragi or Kaguya before Tsubame personally.
bruh, i have been through these kinds of girls and you know what, they are worth it.
you may have missed out on a lover but you gained a true friend, someone who got your back.
Don't take friendzone as an insult, only people without real ones do that.
"With this character's death, the thread of prophecy is severed. Restore a saved game to restore the weave of fate, or persist in the doomed world you have created"
@BrunoVilla Actually, didn't Tsubame say she went to see her before this whole rumor spreading? So, maybe she's heard all of this and is on her way to apologize to him?