It's probably more prevalent than some might want to admit, but the illusion or delusion that the female partner in a sexual situation has to be a virgin and inexprienced just got broken harder than by the so-called right hand touch of the male protagonist from To Aru Index ... and very well done, I say.
A few more (a-hem) "sessions" like that (sequel, anyone?) and I daresay Takeguchi's self-confidence issues will be practically solved.
And an assertive 'take-charge' lady like Misaki is fine, too.
So...Sleeping with her = Helping to build confidence?
Quite the surefire way to do so, I must say. Nothing like sex to motivate a man to try harder and be more confident.
Great ending though. Yeah...He can do it if he tries. Now if he's a good at work as he is in the sack, then I'm sure things will go fine.
As long as she keeps up these...'confidence building' sessions.