The protagonist, an older brother to four sisters, suffered from severe asthma as a child. As a result, it became a daily routine for him to sleep with one of his sisters.One day, his parents, who are also researchers, ordered him to participate in an experiment to prove the "immune-boosting effects of hugging.""Hug your sister lovingly for at least 10 seconds every day before bed ♪"Now, our protagonist must incorporate this nightly embrace into his routine with whichever sister he's sharing a room in the evening....
Onii-chan, Asa made Zutto Gyutte Shite! has not appeared in our Steam sample enough to calculate it's similar novels... sorry!
A novel needs atleast 20 owners before it's similarity is calculated.
