It's a manga. Stop using logic. Just enjoy the ride. ヾ(❀╹◡╹)ﾉ~
To answer your question getting someone pregnant is actually a pretty complicated process! There are entire forums dedicated to monitoring/learning to monitor a person's cervix to see when conceiving is easier. And to be fair they can just take day after pills.
but also it's just porn lol
Ye lol when ppl fuck in porns they don't get pregnant irl, but if u wanna see pregnant n stuff there's a whole genre on that too
this is my first (half) hentai and I have a question. The first time ML and female MC met, he came inside. Do all guys in hentais come inside and not expect to get a kid? Or all women in hentais are on constant birth control? Like I get that it's hot, but consent? omg. （￣へ￣)