Two short stories by Kaneko Aru.

1. Himitsu to Mitsumete (ひみつとみつめて)
"I will treasure this forever" - classmates Hina and Mitsuki are secretly dating. Hina wants to have the popular Mitsuki all to herself, as a present she gave Mitsuki and herself matching keystraps. When Mitsuki touched the keystrap, she felt something hard within it. This is... a wiretap!?

2. Kawarukoto (かわること)
Months and years pass by and various things change between them. But, some things didn't change. A story of two students who are childhood friends.