If you're looking for manga similar to Love Junkies, you might like these titles.
The manga revolves around a boy who meets an older woman over the internet. As he gets closer to her, he wants to meet her in person, to touch her, and to do naughty things to her.
After silencing her parents' objections with the lie "I'm carrying Shu's child!" Hime and Shuichi were left with no choice but to make that lie into the truth. But day after day and night after night love making is causing Shuichi's baby batter to dry up!!