I'm so sorry!!! I drew this picture with ballpen without any sketch with pencil. Than I colored it on computer in 40 minutes.
Oh... and for didn't understend the tilte it's in Japanese:
In Japan 'Hon no kimochi' means 'a true felling', but it's used when you want to show you are glad to someone, giving a gift for this person.
Here I used it like the girl and the boy were giving presents of valentine's day to each other.