I understand that MC wanted to preserve the game route as much as possible.
But I'm assuming the protagonist (Yuuma) will only help Tenma (the armored girl) if he is in her route.
But at this point, it doesn't seem like he is in her route. Tenma is closer to MC than the protagonist.
That means there would be no one who can help Tenma.
I wish the MC realizes that thing has changed and takes more freedom in his actions.
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That aside, I wonder how the ntr dude can get that close with class B's leader.