Searching A Manga Title

i’ve never made a community post on here so idk what i’m doing,,,, anyway i have been trying to look for a bl manga i read a while back with a hard of hearing ml and the mc is an outgoing sort of person who the other one likes cuz his voice is easy to hear. they’re in a school setting a believe,,, if anyways knows please help me out

I was searching these manga/hwa for so long but still no ans

1) manga (not yaoi or Shounen Ai)

• slice of life (black and white manga)
• take care of mature little girl of sibling (sis maybe)
• little girl is so mature so she do most of house work
• but she is so alone inside
• he and his best friend take the little girl in amusement park
• I remember most of ppl say her mother is a stupid in comment

it's a manga(black and White) not yaoi, story about a high school guy's sis (or else) tell him to take care her kid(girl) so that guy start thinking it's literally trouble some to caring a child but that girl is totally mature and do lots of house work but totally alone inside so he and his best friend decide to go amusement park with her when they went there the she lose but because her nature is mature so she not tell anyone that she lose

2) manhwa shoujo

t's webtoon school life
a guy looks a bit scary but actually good person from inside
a girl first mistaken him and scared but after when she knows he is good person but have no friends then she started making target for making 100 friends for him but he truly only love that girl from inside

3) manhwa- historical strong female lead

I just remember a seen of manhwa
historical fantasy~
a girl (maybe with blond hair not sure) ~
killing people or a person
swordstained with blood (bloody sword)
then a guy came
and stop her
and also control the guy she is try to killing
I think he try to make pure his soul or killing demone soul maybe~

I lose a manhwa (colorful)
so suggest or recommend manhwa under these points
* sword
* blood
* historical
* girl try to kill other man
please suggest any manhwa which for related to these points ┗( T﹏T )┛