Romance manga w/ parent/guardian MCs

Elaine, disguising herself as an ugly girl to avoid troubles, took in a pair of twins at an especially dark night. Nonetheless, the twins' handsome dad caught up to her for his babies soon later and he started to doubt her intention, inquire into her past, and eye her with thorough contempt… finally triggering off hatred successfully.
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○ kids are 4 y/o
○ : infidelity (not between main couple), violence, kidnapping, murder, drugging, abuse

Emilia Lincoln fell in love with Dominque Hastings, and they became engaged. When Emilia overheard Dominique tell his friends he was only marrying "that ugly woman" for his own benefit, she turned him down. Years later, now going by Emma Lawrence and unrecognizable, she is tutoring his child. Despite her intention never to see him, their meeting again is inevitable.
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○ kid is around primary school age
○ : attempted rape (by 3rd party)

Alex is the unbelievably rich heir of a prestigious family. Jenny's younger sister, Chloe, claimed that this man was the father of her child before she passed away. Jenny wants more than anything for Alex to take responsibility, so she brings Daisy to visit Alex at his house. He gives the two of them an appraising look, and finally says, scornfully, "Is it money you're after? That's too bad. That baby isn't mine."
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○ kid is an infant

Rena lives a double life as a normal high school girl and a mangaka drawing sexy love scenes. All seems to be going well until she accidentally bumped into popular high school idol, Tomoya. Rushing away from the encounter, Rena suddenly realized that she has lost her latest draft! Quickly rushing to school, she was surprised to see Tomoya waiting for her. Could this be end of her drawing days? What does Tomoya have in store for her?
○ (ch 7)
○ kid is in primary school

Araxa, a 29-year-old woman, had died in a tragic car accident only to be reincarnated into a three-year-old girl who's a noble in a mysterious world filled with magic! Now named Adina, she learns magic and becomes powerful. One day, she meets a mysterious boy wizard who will change her life forever.
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○ kid is an apprentice
○ kid is around primary school age

As the eldest sister, Ayano must look after her three younger siblings. She has no time for love. But when Kaede asks her out, can she juggle her responsibilities and her blooming love for Kaede?!
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○ kids (triplets) are in daycare

After years, Suk-O is thrilled to run into his high school crush, Suh-hee. The two have a one-night-stand, and when he wakes up he finds her baby in his bed and a note from Suh-hee saying she's sorry!
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○ child is an infant
○ : intercourse with one party drunk

Arcella, who lived a glorious life that everyone envied but died of illness at a young age. Before her death, she regretted not having become a proper mother to her son. But somehow, she went back three years ago. Arcella is living her second life. She vows to be a loving mother this time. However, is it too late?
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○ kid is 15 y/o
○ marriage of convenience

When millionaire Benedict del Castillo alighted from the yacht and Mia's eye fell on him, she thought her heart was going to stop. She had once made love with him, despite not knowing his name.
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○ kid is 3 y/o

After dying in a car accident, a coroner wakes up in ancient China. After being attacked by a drugged man she unsuccessfully tried to treat, she bore a child and started crossdressing to get by.
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○ : drugged sex, gore