Albeit it's obvious Takagi likes him, but you can't never be too sure with 'some' girls. I had some experiences similar to this series, albeit not on the same level, with a girl over a couple of months and i was like "does she like me or what?" Long story short, she didn't, not on a romatic scale, but we did make out for a week to check out if there was anything there but that was it and out relationship got awkward and we distanced from each other. So you never knows or maybe you're not a manga character.