vols 1 & 2 and part of vol 3 of this was uploaded 5 years ago (using the English title) by an uploader who is not on nyaa any more ... here it is complete
it is an ecchi loli time-travel rom-com a young woman travels back through time because she had a crush on the teacher and wants to stop him from ending up marrying a different girl (a former classmate), so that she can marry him https://www.mangaupdates.com/series/i0rzqpg/ore-wa-lolicon-ja-nai
