Hikaru ga Chikyuu ni Itakoro...... (Volume 10 - Final Volume)

<<Source: Baka-Tsuki>>

The story starts with the death of Hikaru Mikado. That guy was a natural charmer, a "harem king", but had no real male friends. After he died, he became a ghost, a soul, but Koremitsu Akagi can see him. Koremitsu though, isn't really like Hikaru. His red hair and his evil-looking eyes make him look like a delinquent, even though he is very kind inside. Hikaru asks him a favour: he wants him to fulfill a promise, which he can't fulfill anymore. The promise was to give his girlfriend and fiancée, Aoi Saotome, 7 gifts for her seventeenth birthday. Koremitsu accepts, and has to work hard to help fulfill Hikaru's promise with Aoi.
However, Hikaru's request of Koremitsu's help doesn't end there!? Actually, there are more girls he made promises with, as expected of a harem king. And thus, Koremitsu continues to be haunted by Hikaru......