MC is a hardworking good person...Too bad her older sister is a idiot that didn't think of the idea of leaving her contact information (Or at least made the MC memorize her new phone number) before she left to run away with her lover at age 18.
I understand running away from the parents and grandfather (Grandfather seems like the annoying rich controlling parent type) but at least say a proper farewell/Goodbye if the older Sister is not planning to come back 'home' to see the MC. This shows off the older sister rash reckless behavior and personality (It also shows off her courage too but at least try to avoid causing emotional damage to your little sister....)
MC is the type of person that put hard deadlines on herself to push herself to get things done...It good to takes things at your own pace since everyone is different (Especially love and romance...Excluding special stupid cases and circumstances in love and romance progress Cough*NO SEGGS for 4 whole years in a relationship despite being adults*Cough) but there are people that challenge themselves to get their tasks done on time or before deadlines. This shows a sign of their diligence...but it is also can be an weakness as well in some cases.
MC want to understand what love is like due to her sister leaving the family behind at age 18 like the other comments said...There is no need to rush love and romance but MC wants to get to close as experience of what her Onee-chan was feeling when she ran away with her lover at age 18 XD
Hopefully MC lives a good happy life with her waifu...MC never reveal your relationship to your grandfather...Make sure you take over all his assets and properties (Successful transfer) before the reveal then laugh like a oujo-sama villainess "ohohohohoh~" at his shock face :0
Grandfather is a fking jerk...Look it good to be somewhat strict on your kids at times to teach them responsibility but your just being a overly controlling jerk (Older sister ran away and Grandfather is like 70% of the reason)...The only good side to being related to the grandfather is just becuz he is 'Rich'...
well now that shes realized she loves her then isnt the next step tongue
Don’t get your hopes up. Tongue is the most suggestive thing one can expect in an Usui Shio manga
Looks at newest chapter
Welp...that is both a yes and a nope. Technically correct but technically not the outcome you people were expecting...Tongue was definitely involved...as expected of the clueless flirting prodigy lol~ If MC's waifu helps train MC well then they can become the top 2 most sought after idols in the school XD
MC can do more tongue in the future when their so-called [temp] Relationship evolves to [REAL OFFICIAL] Relationship...
Just hope we don't get a (1-2) misunderstanding chapter and that MC's waifu (Nagi) shows off her loyalty and love to the MC by gently rejecting the confession...I will be really shock if Nagi actually accepts the confession (0.1% chance but it possible that we would get taking NTR-like damage if that does happen...)