this isn't ntr, more like unintentional cheating, chick is the "air-head" character type so she can be talked into shit but even without being able to read the kanji I can tell she was told screwing the 1st guy would somehow benefit the guy at the end.
Base +7, Einnashe -8, stupid army +9, backslash +7, Gui Cogo -12, synce -11, sayoaruka -6, ThanatosNebula76 -8