I mean, it makes thematic sense to leave Chidori and Shinji to their fate. But I can't abide by such tragedy.
As for romancing both, I mean, I certainly didn't intend to romance Shinjiro, and the dialogue didn't seem to indicate romance on his S.Link. Eh, I don't know. The important thing is, I saved him, and that's what counts!
You can tell I prefer P4 in the P3/P4 battle.