http://www.mangago.me/read-manga/ore_to_omae_no_stalker_boushihou/
Same is very stalker-ish and possessive
And for the story that your looking for, ik this sounds weird but did they meet each while the seem was looking at a bird?
Lol well I dont often read stalker type manga but I have one more (๑•ㅂ•)و✧
http://www.mangago.me/read-manga/konoyo_no_hate_made_i_love_you/
The seme is this school prince sort of guy and falls for the uke when he bumps into the prince guy and gives him some sort of compliment and the seme falls for him? The semes also a possessive sort of yandere guy.
Or any stories with an innocent uke and possessive seme is good :3