Sequel to Akai Ito No Shikkou Yuuyo - this time story concentrate abaut guy who can cute any kind of string - he helps one of his clients, they become fuck buddies he realise his feeling and run away, some time past and they end up togheter;
next chapters telling the story 1 year later in they relationships as they starts live together and the former client and lover at present get red string, in the end they decidec to fight fate and stay in relatioship after cutting strin of fate
also the 1 year gap is probablly in diffrent manga imma go read this and update here if its true or not
UPDATE: NOT TRUE! Tsunaida Koi no Kanaekata - those are the same chapters form starting to live together moment
Kanawanu Koi no Musubikata