Title: Gary and Karen. Sentence 1: Gary had a big crush on Karen. Sentence 2: He tried flirting with her for years but she didn't seem to notice. Sentence 3: One day, Gary decided to write out his feelings in a heartfelt letter. Sentence 4: When he gave Karen the letter she was overwhelmed by emotion.
To Gary's delight, Karen said that she felt the same way about him.