Hikaru ga Chikyuu ni Itakoro......
(ヒカルが地球にいたころ......
(https://vignette.wikia.nocookie.net/sonako/images/e/e3/Hikaru_v5special_cover.png/revision/latest?cb=20150808114449)
Story Synopsis:
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......
Volume 1 : https://archive.org/download/HikaruGaChikyuuNiItakoroVolumes1-8/When%20Hikaru%20was%20on%20the%20Earth%20-%20Volume%2001%20-%20Mizuki%20Nomura.epub
Volume 2: https://archive.org/download/HikaruGaChikyuuNiItakoroVolumes1-8/When%20Hikaru%20was%20on%20the%20Earth%20-%20Volume%2002%20-%20Mizuki%20Nomura.epub
Volume 3: https://archive.org/download/HikaruGaChikyuuNiItakoroVolumes1-8/When%20Hikaru%20was%20on%20the%20Earth%20-%20Volume%2003%20-%20Mizuki%20Nomura.epub
Volume 4: https://archive.org/download/HikaruGaChikyuuNiItakoroVolumes1-8/When%20Hikaru%20was%20on%20the%20Earth%20-%20Volume%2004%20-%20Mizuki%20Nomura.epub
Volume 5: https://archive.org/download/HikaruGaChikyuuNiItakoroVolumes1-8/When%20Hikaru%20was%20on%20the%20Earth%20-%20Volume%2005%20-%20Mizuki%20Nomura.epub
Volume 6: https://archive.org/download/HikaruGaChikyuuNiItakoroVolumes1-8/When%20Hikaru%20was%20on%20the%20Earth%20-%20Volume%2006%20-%20Mizuki%20Nomura.epub
Volume 7: https://archive.org/download/HikaruGaChikyuuNiItakoroVolumes1-8/When%20Hikaru%20was%20on%20the%20Earth%20-%20Volume%2007%20-%20Mizuki%20Nomura.epub
Volume 8: https://archive.org/download/HikaruGaChikyuuNiItakoroVolumes1-8/When%20Hikaru%20was%20on%20the%20Earth%20-%20Volume%2008%20-%20Mizuki%20Nomura.azw3
Volume 9: https://archive.org/download/HikaruGaChikyuuNiItakoroVolumes1-8/When%20Hikaru%20was%20on%20the%20Earth%20-%20Volume%2009%20-%20Mizuki%20Nomura.epub
Volume 10: https://archive.org/download/HikaruGaChikyuuNiItakoroVolumes1-8/When%20Hikaru%20was%20on%20the%20Earth%20-%20Volume%2010%20-%20Mizuki%20Nomura.epub
For some reason those other links didn't work out for me, so I posted these since they worked when I downloaded them onto my phone. I wanted them in PDF, but sadly these are epub.
please read the rules and follow it