Best scene for me was when Shiori tripped and then leaned onto Keima for god knows how long, that was really cute. Oh god that reaction. lol :3
The fact that Keima was waiting for Shiori to say something and not interrupt her is also a special moment.
When you're so shy and closed up you'll never meet anyone who has the patience to wait on you to say something.
Even then, when the person keeps staring at you like Keima did at Shiori, you will get really nervous... you'll feel pushed on without forming any compromised answer and often you blurt out something very generic, not to mention say it wrong.
That just makes you close up again and it makes the cycle of shyness.
Unless that person approaches you enough to change you. Good luck, Keima.
edit: One of the tracks I'll look forward to the most will so be Shiori's piano and orchestra music once an OST comes around.
Tranquility pure.