Hoshizora no Memoria: Wish Upon a Shooting Star HD

Kogasaka You and his sister Chinami move back to their hometown of Hibarigasaki after their mother passes away. Years earlier, before moving to the city, You spent every afternoon at the town observatory with a girl who became his first true friend. When he left, she made him promise to return and marry her someday — and kissed him on the forehead. Now, returning to Hibarigasaki, the observatory is abandoned and fenced off. A mysterious girl named Mare is there, looking strangely like his childhood friend. Who is she really? And will You ever find the friend he promised to come back for?