Kimi ni wa Todokanai

This is a classic Japanese High School Romance drama. It uses all of the tools you can find in every manga about High School stories. From sending a love letter to your crush at the school, going on a study tour with your classmates then getting under the same blanket with your crush, going to a temple to get a love charm for your crush, to gifting sweets as a way to confess to your crush. You can find them all in this series. The story was unexpectedly sweet and likable, just like the main characters. It was well acted and the plot was delivered beautifully. There wasn't any unnecessary long scenes, so you won't have to worry about getting bored watching it.