reading manga's manga / #multiple couples(1)

i first read it in like 2016 rereading it side couple ch 3, ch4, ch 6, ch 8, ch 9, ch 12 main couple mc is rlly insecure n think hes a burden a lot in their relationship. they get together pretty early on and the rest of the story is just them finding the right time and location to have their first time together. chapters are long