Shota's Isekai NTR Adventure - Chapter 6 System?

Pain, Pain, Go Away is a novel by Sugaru Miaki, also known as Fafoo, author of Starting Over and Three Days of Happiness. Unlike Miaki’s previous two books, Pain, Pain, Go Away is not a rewrite of any story posted to 2ch, but an entirely original one.

The plot involves a young man who becomes a killer (by accident) – but his victim has the power of “postponement,” temporarily delaying her death.

Ai Qian, a street-crazy author who wakes up every day because of her own poverty, is bound by the system!
The system is obedient: Host, you are the daughter of a rich family, you are a billionaire female president, you are a superstar… Are you happy?
Ai Qian: Hehe, I might be happier if there is no hero who can kill me at any time.

- Description from novelbuddy

Mc unexpectedly got into a very funny accident during a mission and died then reincarnated in this new wonderful world.

Before reincarnating he met a very beautiful goddess who unexpectedly took him as a student under his one wish which the goddess decided to grant him.

He learnt various kinds of things under goddess teachings and spent 1000 years practising them by heart under her watch.

Mc wisely used those years to learn everything he can handle and was sure he would need them.

So that’s how he got the knowledge to become Op quickly with a bonus as an eternal companion, Aashi.

After reincarnating in this world he started to fulfil his dreams one by one like having a big family with multiple beautiful and capable wives, and along the way conquering multiple realms.

After fulfilling most of his desires he sat in a peaceful home and said, “Now I can say for sure, my wish as a lazy otaku has been fulfilled. I remember I haven’t seen the new anime, my lovely wives, do any of you want to watch this anime together with me as I starting so hurry up otherwise, you will miss it.”

Disclaimer:

This is the story of Lazy Otaku who got the chance to fulfil his long-cherished wish.

So come join our 1000year old otaku soul, in his journey to be horne..cough…I mean a journey to conquer countless realms and how he makes the strongest & largest family in all the realms.

.....

Upon waking up from the dream, Josie traveled from the 21st century to Chicago in 1943, becoming a poor boy wandering the streets.

World War II? For Josie, who is still underage, it is too far away.

As an orphan, how he can survive in this age is the most important thing.

Fortunately, he has a plane trading system. In this era, being a master of time and space can make a good life if you think about it.

However, a few months later, Josie, whose life had just improved a little, looked at Captain America, who was singing and dancing with a group of girls on the stage of the war fundraising benefit performance, and fell silent.

It’s over, Barbie Q is over.

This is Marvel!

- Description from Novelupdates