I wonder just how much more manly and carefully he could be in next chapter (when he just cover for her and do not let any move on him). Just fucking awesome. But, please, do not become standart "ore ga mamoru"-kun...
I hope that if it after all in some point will end in affair or going out with Hara, it will not be in hentai "fuck at night of meeting" style, but long and normal feelng development. Hara's just desperate and her feelings are not "adult" yet. And for now she is just attractive co-worker for Ozu.