MIGHT CONTAINS MINOR SPOILERS
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❦ List of POSSESSIVE SEMES ❦
http://www.mangago.me/home/mangalist/418506/
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❦ Light Novels with POSSESSIVE GUYS ❦
https://www.novelupdates.com/viewlist/248/
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Yaoi manga where:
1. Uke and some are lovers but they broke-up, then after a few years or months, they got back together again.
2.. Uke and seme are childhood friends and they become lovers.
3. Uke and seme got separated for a long time and after a few years they reunited
3. Seme and uke have a relationship and they broke-up. When the person who initiated or started the break-up wants to be with his former lover again, that lover said it's too late..it's either he already had a new lover or he already move on.
~sorry for my english~