She loved him for 7 years and thought it was unrequited, but he had liked her for a while too (wasn't made clear how long). It would have been nice if it was longer. At least 1 whole book. 4.5/5 because it was so short.
Mitsugetsu no Maku ga Agaru Toki, Onee Danshi to 7 Nen Me no Kataomoi