The Golden Sheep Vol. 1 (manga)

From the creator of the acclaimed The Gods Lie comes Kaori Ozaki's latest series!

Winter of junior year. Not quite able to become adults, we couldn't stay as we were as children, either.
Our tale explores a group of teenagers and their impatience and rebirth.

"They say if you write down your wish, bury it under Sheep Tower and then dig it up after 7 years and 7 months, your wish will come true..."

Tsugu Miikura, a high schooler who loves to play guitar, due to family circumstances, moved away from the rural town where she had spent her childhood. After several years, she's back in her old hometown. She reunites with her childhood friends--Sora, Yuushin, and Asari--the friends she'd buried a time capsule with back in elementary school. Tsugu is overjoyed to be with her friends once more, but the bonds that she thought would never change have in fact started to grow major cracks...