Over 20 years have passes since events of Milkyway 2. Cafe owners migrated overseas leaving the establishment for Sakuya to inherit. Once again he returns to the cafe in attempt to try to revitalize it with new workers and fight debt. Young entertainment genius Koibun buys crumbling Milkyway from Sakuya. Both descendants of former heroines and new girls flood the coffee shop once more.

[From vndbreview]